Mời trao đổi một số câu hỏi ôn tập CCNA

[dangquangminh]

Các bạn thân mến,


1.Which statement describes the routing protocol OSPF (choose 3)

A.It supports VLSM
B.It is used to between Autonomous systems
C.It confines network instability to one area of network
D.It increases routing overhead over the network
E.It allows extensive control of the routing update
F.it is simpler to configure than RIPv2

2. Error detection schemes use which field of frame to detect error?

A.MTU
B.MAC
C.FCS
D.PDU
E.ERR
F. Flag

3. Which of the following are characteristics of microsegmentation? (Choose two)

A. Dedicated paths between sending and receiving host are established
B. the number of collision domains is decreased
C. Broadcast domain are enlarged
D. Multiple subnetwork broadcast addresses are created
E. Multiple ARP tables are required on the connected hosts
F. Bandwidth is dedicated to connect hosts

4. Which statement describes the rule of split horizon?

A. Only routers can split boundaries (horizons) between concentric networks.
B. All distance vector protocols require fall back routers that may cause momentary loops as the topology changes.
C. Networks can only remain fully converged if all information about routers is sent out all active interfaces.
D. Information about a route should not be sent back in the direction from which the original update come.
E. Each AS must keep routing tables converged to prevent dead routes from being advertised across the AS boundary.

5. A network host is configured as follows: Host IP address: 192.168.16.183 Subnet mask:255.255.255.224 Default gateway: 192.168.16.190. Which of the following statements describe the network to which this host is attached? (Choose three)

A. The default gateway is configured on a different subnet form this host.
B. The host is a member of the fifth usable subnet of the 192.168.16.0 network.
C. The sub network address for this host is 192.168.16.160/28.
D. The address of the next higher subnet is 192.168.16.192.
E. The address of the router interface that is attached to this sub network is 192.168.16.190.
F. There are 60 usable host addresses on this subnet.

6. You have configured a new Frame Relay link on a router that is using IGRP.
Which command would you use to set the IGRP metric for the speed of this link?

A. Contoso Router(config)# IGRP metric 256K
B. Contoso Router(config)# bandwidth 256
C. Contoso Router(config-if)# metric 256K
D. Contoso Router(config-if)# bandwidth 256

7. What is a global command?

A. A command that is available in every release of IOS, regardless of the version or deployment status.
B. A command that can be entered in any configuration mode.
C. A command that is universal in application and supports all protocols.
D. A command that is implemented in all foreign and domestic IOS version.
E. A command that is set once and affects the entire router.

8. An administrator has decided to use the private address 172.20.0.0 for the internal network. If the maximum number of hosts allowed on a subnet is 62, which of the following is true regarding the addressing scheme?

A. 172.20.62.255 is a host address.
B. Ten bits were borrowed for subnets.
C. 255.255.255.252 is the subnet mask.
D. 172.20.255.64 is a subnet address.
E. Seven host bits must be used to meet the addressing scheme requirement.

9. What feature of a networks switch allows an administrative to create separate broadcast domains?

A. Store-and-forward switching
B. Micro segmentation
C. Transparent bridging
D. Fragment-free switching
E. Virtual LANs
F. Cut-through switching

10. Which of the following options lists the steps in PPP session establishment in the correct order?

A. Optional authentication phase, link establishment phase, network layer protocol phase.
B. Network layer protocol phase, link establishment phase, optional authentication phase.
C. Network layer protocol phase, optional authentication phase, link establishment phase.
D. Link establishment phase, network layer protocol phase, optional authentication phase.
E. Link establishment phase, optional authentication phase, network layer protocol phase.
F. Optional authentication phase, network layer protocol phase, link establishment phase.

11. Which Frame Relay feature is responsible for transmitting keep alive to ensure that the PVC does not shut down because of inactivity?

A. DLCI
B. BECN
C. FECN
D. LMI
E. CIR
F. DE

12. Which characteristics are representative of a link-state routing protocol? (Choose three)

A. Provide common view of entire topology
B. Exchange routing tables with neighbors.
C. Calculates shortest path.
D. Utilizes event triggered updates.
E. Utilizes frequent periodic updates.

13. Which of the following contribute to congestion on an Ethernet network. (Choose two)

A. Use of full duplex mode.
B. Creation of new collision domain.
C. Creation of new broadcast domain.
D. Addition of hub to the network.
E. Use of switches in the network.
F. Amount of ARP or IPX SAP traffic.

14. Exhibit:

Which of the following is the minimum configuration commands required to bring up the ISDN link shown in graphic. Note : SPIDs are not required for this switch. (Choose three)

A. Router(Config-if)# encapsulation PPP
B. Router(Config-if)# isdn switch-type type
C. Router(Config-if)# dialer-list, protocol ip permit
D. Router(Config-if)# dialer map ip address name name connection number.
E. Router(Config-if)# ip address subnet mask
F. Router(Config-if)# dialer group 1

15. The command frame - relay map ip 10.121.16.8.102 broadcast was entered on the router. Which of the following statement is true concerning this command?

A. This command should be executed from the global configuration mode.
B. The IP address 10.121.16.8 is the local router part used to forward data
C. 102 is the remote DLCI that will receive the information.
D. Command is required for all frame relay configuration.
E. The broadcast option allows packet, such as RIP update, to be forwarded across the PVC.

16. Exhibit:

MTU 1500 bytes, Bw 10000 Kbit, Dly 1000 Usec.reliability 128/255, txload 1/255, rxload 1/255Encapsulation Arpa, loop back not seCKeepalive set (10 Sec)ARP type: Arpa, Arp Timeout 04:00:00Last Input 21:24:36, output 00:00:08, output hang never last clearing of "show interface" countees never Queuing strategy: FIFO Output queue 0/40, 0 drops; input queue 0/75: drops5 min input rate 0 bits/sec, 0 packets/sec 5 min output rate 0 bits/sec, packets/sec75427 packet input, 10685636 bytes, 0 buffer Received 75427 broadcast, 933 runts, 253 giants, 0 throttles0 input error, 0 cvc, 0 frame. 0 overrun, 0 ignored0 input packet with dribble condition detected78387 packet output, 7329230 bytes, 0 under nuns.

During routine network maintenance, a technician issues the show interface E0 command. A partial output of the command is shown in exhibit which values displayed in the command output could indicate that collisions have occurred (Choose two)

A. MTV 1500 bytes
B. Reliability 128/255
C. 933 runts
D. 75427 broadcasts
E. 78387 packets output
F. 253 giants

17. Exhibit:

Given the topology as illustrated, what commands are needed to configure IGRP on the Contoso1 Router? (Choose three)

A. Contoso1 (config ) # Router IGRP 100
B. Contoso1 (config) # router IGRP
C. Contoso1 (config - router) # network 192.168.6.0
D. Contoso1 (config - router) # network 192.168.7.0
E. Contoso1 (config - router) # network 192.168.8.0
F. Contoso1 (config - router) # network 192.168.9.0

18. Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two)

A. Transport layer divides a data stream into segments & adds reliability & flow control information
B. Data link layer adds physical source & destination address & an FCS to the segment
C. Packets are created when the network layer encapsulate a frame with source & destination host address & protocol related control information
D. Packets are created when the network layers adds layers 3 address & control information to a segment
E. The presentation layer translated bits into bits into voltages for transmission across the physical link

19. Exhibit:

After Configuring the router show in the exhibit, the from the technician's laptop to all of the interface on each router were successful, if a technician initiates a telnet session to Router Contoso1 and issues the show arp command, which of the following items will be among the entries displayed in the output?

A. The MAC address of the S0 interface on Router Contoso1
B. The MAC address of the E0 interface on Router Contoso1
C. The MAC address of the S0 interface on Router Contoso2
D. The MAC address of the E0 interface on Router Contoso2

20. Exhibit:

Given a Network with a switched topology as illustrated. What will be the result if the Spanning-Tree Protocol is disabled on all the switches? (Choose two)

A. Broadcast Storm will occur.
B. Broadcast Storm will be detected quickly.
C. At least one link will be placed in standby.
D. Loops will occur.
E. Loops will be detected quickly.


21. The Frame relay circuit between Contoso1 & Contoso2 is experiencing congestion. Which type of notification are used to alleviate the congestion? (Choose three)

A. FECN
B. CIR
C. BECN
D. DE
E. DLCI 100 is Down

22. What does a configuration Register Setting of 0x2105 indicate to the Router?

A. The Boot IOS Code is Located in the NVRAM.
B. Check NVRAM for boot system Commands.
C. Bypass NVRAM Configurations.
D. Boot the IOS Code Located in ROM.
E. Perform a Password Recovery.
F. Bypass The Code In ROM.

23. All WAN links is side the Contoso.com network use PPP with for authentication security. Which command will display the CHAP authentication process as it occurs between two routers in the network.

A. show CHAP authentication
B. show interface serial 0
C. debug PPP authentication
D. debug CHAP authentication
E. show PPP authentication CHAP
24. Which of the following if addresses can be assigned to host devices (Choose two)

A. 205.7.8. 32/27
B. 191.168. 10. 2/23
C. 127.0.0.1
D. 224.0.0.10
E. 203.123.45. 47/28
F. 10.10.0.0/13

25. How many usable sub network and usable hosts per subnet result in the network address 201.105.13.0 is sub netted with a mask of /26?

A. 64 network and 4 hosts
B. 4 network and 64 hosts
C. 2 network and 62 hosts
D. 62 network and 2 hosts

END OF PART I.

[dangquangminh]

26. A Router with a BRI/T interface will be used for an ISDN Connection what other ISDN device is required to complete this connection?

A. TE1
B. TE2
C. NT1
D. NT2

27. Contoso.com has allocated the IP add 199.144.27.0 is its network, to provide flexibility for the LAN design, a subnet mask of 255.255.255.240 has been chosen. Which of the following address can be assigned to LAN on the resulting subnets (Choose three)

A. 199.141.27.33
B. 199.141.27.112
C. 199.141.27.119
D. 199.141.27.126
E. 199.141.27.175
F. 199.141.27.208

28. You are configuring a new Catalyst switch that you want to manage remotely from workstations on other network segments within your enterprise. Which of the following are required to allow remote management of the switch over IP? (Choose two)

A. The switch name must match the workgroup name of the local network.
B. The switch must be configured with an IP address and default gateway.
C. The remote workstations must have access to the management VLAN of the switch.
D. CDP must be enabled on the switch so that it can be located by other devices on the network.

29. Which command is used to display the placement and direction of an IP access control list on a router?

A. show access-list
B. show ip route
C. show ip interface
D. show interface
E. show interface list
F. show ip interface brief

30. What is the purpose of typing o/r 0x2142 during a password recover procedure on a 2500 series router?

A. To enter ROM Monitor mode.
B. To restart the router.
C. To bypass the configuration in NVRAM.
D. To view the lost password.
E. To save the changes to the configuration.

31. New switches have been purchased for a network upgrade. The objective for the network design emphasizes efficient, error-free transport instead of fast transport. Which switching mode should be configured on the new switches to provide error-free transport to the network?

A. cut-through
B. fragment-free
C. frame-filtering
D. store-and-forward
E. 802.1q forwarding
F. VTP transparent mode

32. A router with a serial interface will be used for an ISDN link. What other function group devices are required to complete the connection to the service provider? (Choose two)

A. TE1
B. TE2
C. TA
D. NT1
E. NT2

33. Exhibit:

Which of the following will configure a static route on Router Contoso1 to network 180.18.30.0/24 with an administrative distance of 90?

A. Contoso1(config)# ip route 90 180.18.30.0 255.255.255.0 182.18.20.2
B. Contoso1 (config)# ip route 90 180.18.20.1 255.255.255.0 182.18.20.2
C. Contoso1 (config)# ip route 180.18.20.1 255.255.255.0 182.18.30.0 90
D. Contoso1 (config)# ip route 180.18.30.1 255.255.255.0 182.18.20.1 90
E. Contoso1 (config)# ip route 180.18.30.0 255.255.255.0 182.18.20.2 90

34. Exhibit:

hostname Cert
!
username cert password Contoso
!
interface serial 0
ip address 172.23.56.2 255.255.255.0
encapsulation ppp
ppp authentication chap
clock rate 56000

hostname cert
username cert password Contoso!

interface serial 0
ip address 172.23.56.3
255.255.255.0encapsulation ppp ppp
authentication chap

The output shown in the exhibit was taken from two directly connected routers. Based on the output, which of the following would be displayed when the command Router# show interface serial 0 is entered? (Choose two)

A. Serial 0 is up, line protocol is up
B. Serial 0 is up, line protocol is down
C. LCP open
D. LCP closed

35. Given a subnet mask of 255.255.255.224, which of the following addresses can be assigned to network hosts? (Choose three)

A. 15.234.118.63
B. 92.11.178.93
C. 134.178.18.56
D. 192.168.16.87
E. 201.45.116.159
F. 217.63.12.192

36. Which of the following host addresses are member of networks that can be routed across the public Internet? (choose all that apply)

A. 10.172.13.65
B. 172.16.223.125
C. 172.64.12.29
D. 192.168.23.252
E. 198.234.12.95
F. 212.192.48.254

37. Which connections allow the use of full-duplex Ethernet? (Choose three)

A. Switch to host
B. Switch to switch
C. Hub to hub
D. Switch to hub
E. Host to host

38. What is the purpose of pressing the Ctrl+Break keys during the router password recover procedure?

A. To restart the router.
B. To bypass the configuration in Flash.
C. To view the password before changes are made.
D. To bypass setup configuration mode.
E. To access ROM Monitor mode.

39. Five minutes after issuing the show running-config command, a technician enters the command again and notices that several access list statements have been altered. Because of this, the technician believes that the router is being configured by an unknown person through Telnet. Before changing the router passwords, the technician would like to discover if anyone is connected to the router by Telnet and stop them from making further changes. Which commands will accomplish these options? (Choose two)

A. show hosts
B. show sessions
C. show connections
D. disconnect
E. CTRL+SHIFT+6x
F. exit

40. Which of the following belong to the ISDN TE2 function group? (Choose two)

A. A standard PC.
B. An ISDN phone.
C. An ISDN terminal adapter.
D. A router serial interface.
E. A router ISDN BRI "U" interface.

41. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location? (Choose two)

A. The switch must be configured with an IP address, subnet mask, and default gateway.
B. The switch must be connected to a router over a VLAN trunk.
C. The switch must be reachable through a port connected to its management VLAN.
D. The switch console port must be connected to the Ethernet LAN.
E. The switch management VLAN must be created and have a membership of at least one switch port.
F. The switch must be fully configured as an SMTP agent.

42.
The network administrator of the Contoso1 router adds the following command to the router configuration:

ip route 192.168.12.0 255.255.255.0 172.16.12.1

What are the results of adding this command? (Choose two)

A. The command establishes a static route.
B. The command invokes a dynamic routing protocol for 192.168.12.0.
C. Traffic for network 192.168.12.0 is forwarded to 172.16.12.1.
D. Traffic for all networks is forwarded to 172.16.12.1.
E. This route is automatically propagated throughout the entire network.

43. What is the subnet work address for a host with IP address 201.100.5.68/28?
A. 201.100.5.0
B. 201.100.5.32
C. 201.100.5.64
D. 201.100.5.65
E. 201.100.5.31
F. 201.100.5.1

44. Which of the following statements regarding routed and routing protocols are true? (Choose two)

A. A routed protocol is assigned to an interface and determines the method of packet deliver.
B. A routing protocol determines the path of a packet through a network.
C. A routed protocol determines the path of a packet through a network.
D. A routing protocol operates at the transport layer of the OSI model.
E. A routed protocol updates the routing table of a router.

45. What should the configuration register value be after successfully completing the password recover procedure and returning the router to normal operation?

A. 0x2100
B. 0x2101
C. 0x2102
D. 0x2124
E. 0x2142

46. Exhibit:

hostname Contoso-A
!
!
interface Ethernet0
!
ip address 192.168.10.9 255.255.255.248
interface Serial0 ip address 172.16.25.1 255.255.255.0clockrate 56000
!
interface Serial1
!
ip address 10.1.1.1 255.255.255.0
router rip
network 192.168.10.0
!
line con 0
password Contoso
log in
line aux 0
line vty 0 4
password Contosologin!end

47. Five new routers need to be configured quickly for testing. While connected to a router by console, the administrator copies and pastes a configuration from e text file, a part of which is shown in the exhibit, into the HyperTerminal window. Why would host 192.168.10.10/29 be unable to ping the Ethernet interface of the router as a result of this procedure?

A. The new configuration needs to be saved to the NVRAM before the changes take effect.
B. The router needs to be reloaded before the changes are implemented.
C. The Ethernet network does not show up in the routing table because the RIP configuration is incomplete.
D. The copied configuration did not overwrite the shutdown command on the Ethernet interface.
E. The subnet mask on the router prevents the host from communicating with it.

49. The following access list was applied outbound on he E0 interface connected to the 192.168.1.8/29 LAN: access-list 123 deny tcp 192.168.1.8 0.0.0.7 eq 20 any access- list 123 deny tcp 192.168.1.9 0.0.0.7 equal 21 any What effect will this access list have?

A. All traffic will be allowed to exit E0 except FTP traffic.
B. FTP traffic from 192.168.1.22 to any host will be denied.
C. FTP traffic from 192.168.1.9 to any host will be denied.
D. All traffic exiting E0 will be denied.
E. All FTP traffic to network 192.168.1.8/29 from any host will be denied.

50. Which of the following describe router functions? (Choose three)

A. Packet switching
B. Collision prevention on a LAN segment
C. Packet filtering
D. Broadcast domain enlargement
E. Broadcast forwarding
F. Internet work communication

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[dangquangminh]

51. A Class C network address has been subnetted with a /27 mask. Which of the following addresses is a broadcast address for one of the resulting subnets?

A. 201.57.78.33
B. 201.57.78.64
C. 201.57.78.97
D. 201.57.78.97
E. 201.57.78.159
F. 201.57.78.254
52. Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?

A. frame-relay arp
B. frame-relay map
C. frame-relay interface-dlci
D. frame-relay lmi-type
53. Exhibit:

A network administrator in London has been instructed to prevent all traffic originating on the Paris LAN from entering the Contoso2 router. Which statement would accomplish this filtering?

A. access-list 101 deny ip 192.168.45.0 0.0.0.255 any
B. access-list 101 deny ip 192.168.45.0 0.0.0.0 any
C. access list 101 deny ip 192.168.46.0 0.0.0.0.255 198.168.45.0 0.0.0.255
D. access-list 101 deny ip 192.168.46.0 0.0.0.255 any

54. Identify three valid host addresses in the 192.168.27.0 network with a subnet mask of 255.255.255.240. (Choose three)
C. 192.168.27.33
D. 192.168.27.112
E. 192.168.27.119
F. 192.168.27.126
G. 192.168.27.175
H. 192.168.27.208
55. You are upgrading your Cisco router IOS from a TFTP server over the network. The upgrade procedure is stopped and you are prompted to erase the current flash contents before continuing. What is most plausible reason for this?
A. There is insufficient room for more than one image.
B. The router has detected a copy of the current software image on the TFTP server.
C. The file can be relocated and not compressed.
D. The image to load is a binary executable file.
56. At Layer 2 of the OSI model, which component connects a host to the network media?

A. Hub
B. Switch
C. Bridge
D. NIC
E. Transceiver

57. Routercs# show ip route

Codes: C-connected, s-static, l -IGRP, R -RIP, M -mobile, B -BGP, D -EIGRP, EX - EIGRP external, O -OSPF, IA -OSPF inter area, EI -OSPF external type 1, E2 -OSPF external type 2, E -EGP, i -IS-IS, L1 -IS-IS level-1, L2 -IS-IS level-2, * -candidate default, U - per-user static route
Gateway of last resort is not set
R 202.30.8.0 /24[120/1] via 202.30.2.2, 00:00:10, Serial 0
C 202.30.9.0 /24 is directly connected, Serial 1
R 202.30.10.0 /24 [120/7] via 202.30.9.1, 00:00:02, Serial 1
R 202.30.11.0 /24 [120/7] via 202.30.9.1, 00:00:03, Serial 1
C 202.30.1.0 /24 is directly connected, Ethernet 0
C 202.30.2.0 /24 is directly connected, Serial 0
R 202.30.3.0 /24 [120/1] via 202.30.2.2, 00:00:10. Serial 0
R 202.30.4.0 /24 [120/15/ via 202.30.2.2, 00:00:10, Serial 0
R 202.30.5.0 /24 [120/15] via 202.30.2.2, 00:00:10, Serial 0
R 202.30.6.0 /24 [120/15] via 202.30.2.2, 00:00:10, Serial 0
R 202.30.7.0 /24 [120/1] via 202.30.2.2, 00:00:10, Serial 0

You examine the routing table of your router named Routercs. This routing table will be send to neighboring routers via broadcasts. Some routes might be discarded and not entered in to the routing tables of the neighboring RIP routers. Which of the following routes would be discarded in this way?

A. R 202.30.8.0/24 [120/1] via 202.30.2.2, 00:00:10, Serial0
B. R 202.30.11.0/24 [120/7] via 202.30.9.1, 00:00:03, Serial1
C. C 202.30.1.0/24 is directly connected, Ethernet0
D. R 202.30.5.0/24 [120/15] via 202.30.2.2, 00:00:10, Serial0
58. Routercs# show ip route

Codes: C-connected, s-static, l -IGRP, R -RIP, M -mobile, B -BGP, D -EIGRP, EX - EIGRP external, O -
OSPF, IA -OSPF inter area, EI -OSPF external type 1, E2 -OSPF external type 2, E -EGP, i -IS-IS, L1 -IS-IS
level-1, L2 -IS-IS level-2, * -candidate default, U - per-user static route

Gateway of last resort is not set

R 202.30.8.0 /24[120/1] via 202.30.2.2, 00:00:16, Serial 0C 202.30.9.0 /24 is directly connected, Serial 1
R 202.30.10.0 /24 is possibly down, routing via 202.30.9.1, Serial 1
R 202.30.11.0 /24 is possibly down, routing via 202.30.9.1, Serial 1
C 202.30.1.0 /24 is directly connected, Ethernet 0
C 202.30.2.0 /24 is directly connected,Serial 0
R 202.30.3.0 /24 [120/1] via 202.30.2.2, 00:00:17. Serial 0R 202.30.4.0 /24 [120/15/ via 202.30.2.2, 00:00:17, Serial 0
R 202.30.5.0 /24 [120/15] via 202.30.2.2, 00:00:17, Serial 0
R 192.158.6.0 /24 [120/15] via 202.30.2.2, 00:00:17, Serial 0
R 202.30.7.0 /24 [120/1] via 202.30.2.2, 00:00:17, Serial 0

You are troubleshooting a router with default settings. You are concerned about the 202.30.10.0 and 202.30.11.0 routes. In particular you are interested how long they will be kept in the routing table. What would be the maximum time these routes would be kept in the routing table?

A. 30 seconds
B. 60 seconds
C. 240 seconds
D. 360 seconds
E. 630 seconds

59. You work as a network technician at Contoso. You have completed the password recovery procedure on a Cisco router. The process is successful and the router returns to normal operation. What is configuration register value at this point of time?

A. 0x2100
B. 0x2101
C. 0x2102
D. 0x2124
E. 0x2142

60. Your Contoso trainee Boris is configuring a serial interface on a Cisco router. He asks you want encapsulations he can use on the interface.
What should you tell him? (Choose three)

A. Ethernet
B. Token Ring
C. HDLC
D. Frame Relay
E. PPP

61. You are configuring a network at Contoso main site in Toronto. You use a distance vector routing protocol. What could you use to prevent rooting loops in the network? (Choose two)
A. Link-state advertisements (LSA)
B. Spanning Tree Protocol
C. Shortest path first tree
D. Split horizon
E. Hold-down timers

62. Your Contoso trainee Jose are interested in ACL’s (access control lists). He asks you want they can be used for. What should you tell him? (Choose three)
A. Protect hosts from viruses.
B. Classify network traffic.
C. Provide high network availability.
D. Identify interesting traffic for DDR.
E. IP route filtering.
F. Monitor the number of bytes and packets.
63. You work as a network consultant. You are planning a network installation for a large organization named Contoso. The design requires 100 separate subnet works, so Contoso has acquired a Class B network address. What subnet mask will provide the 100 subnet works required, if 500 usable host addresses are required per subnet?

A. 255.255.240.0
B. 255.255.246.0
C. 255.255.252.0
D. 255.255.254.0
E. 255.255.255.0
F. 255.255.255.192
64. You work as a network technician at Contoso. You are required to establish a Telnet session with a Cisco router. Which commands should you use?

A. Contoso1(config)# line console 0
B. Contoso1(config)# line console 0
C. Contoso1(config)# line console 0
D. Contoso1(config)# line vty 0
E. Contoso1(config)# line vty 0
F. Contoso1(config)# line vty 0
65. Your Contoso trainee Fernanda is studying the spanning three algorithm. She asks you how the spanning-tree path cost is determined by default. What should you tell her?

A. Total hop count.
B. Sum of the costs based on bandwidth.
C. Dynamically determined based on load.
D. Individual link cost based on latency.
66. You work as a network technician at Contoso. You have subnetted the 201.105.13.0 network with a /26 mask. Your boss asks you how many usable sub networks and usable host addresses per subnet this will provide. What should you tell her?

A. 64 networks and 4 hosts
B. 4 networks and 64 hosts
C. 2 networks and 62 hosts
D. 62 networks and 2 hosts
67. You work as a network technician at Contoso. You have subnetted the 213.105.72.0 network with a /28 mask. Your boss asks you how many usable sub networks and usable host addresses per subnet this will provide. What should you tell her?

A. 62 networks and 2 hosts
B. 6 networks and 30 hosts
C. 8 networks and 32 hosts
D. 16 networks and 16 hosts
E. 14 networks and 14 hosts

68. You are working as a network technician at Contoso. You are required to troubleshooting the WAN link between the Contoso main office at Boston and the Contoso remote office at Rio De Janeiro. A Cisco router that was providing Frame Relay connectivity at the Rio de Janeiro site as replaced with a different vendor's frame relay router. Connectivity is now down between the Boston and Rio De Janeiro site.
What is the most likely cause of the problem?

A. Mismatched LMI types.
B. Incorrect DLCI.
C. Mismatched encapsulation types.
D. Incorrect IP address mapping.

69. You have told your boss at Contoso that the OSI model has 7 layers. He is curious which on the application layer. He asks you to give him to examples of items associated with the layer.

What should you tell him? (choose two)

A. ping
B. Telnet
C. FTP
D. TCP
E. IP

70. Exhibit: o/r 0x2142

You are working with a 2500 series Cisco router. You are performing the password recovery procedure. You have just typed the command shown in the exhibit. Your Contoso trainee Mahmoud is curious on the purpose of this command. What should you tell him? (choose all that apply)

A. To restart the router.
B. To bypass the configuration in NVRAM.
C. To view the lost password.
D. To save the changes to the configuration.
E. To enter ROM Monitor mode.
71. Your boss at Contoso want you to brief him on differences and similarities between bridges and switches. What should you tell her? (Choose two)

A. Bridges are faster than switches because they have fewer ports.
B. A switch is a multi port bridge,
C. Bridges and switches learn MAC addresses by examining the source MAC address of each frame received.
D. A bridge will forward a broadcast but a switch will not.
E. Bridges and switches increase the size of a collision domain.

72. Your Contoso trainee Bob wants some information regarding the split horizon rule. What should you tell him?

A. Only routers can split boundaries (horizons) between concentric networks.
B. All distance vector protocols require fall back routes that may cause momentary loops as the topology changes.
C. Networks can only remain fully converged if all information about routes is sent out all active interfaces.
D. Information about a route should not be sent back in the direction from which the original update came.
E. Each AS must keep routing tables converged to prevent dead routes from being advertised across the AS boundary.
73. Your Contoso trainee Ellen is studying the basic of distance vector and link state routing protocols. As her mentor, what could you tell her? (Choose two)

A. Distance vector protocols send the entire routing table to directly connected neighbors.
B. Link state protocols send the entire routing table to all routers in the network.
C. Distance vector protocols send updates about directory connected neighbors to all networks listed in the routing table.
D. Link state protocols send updates containing the state of their own links to all other routers on the network.
74. You have segmented a network into two separate segments, segment 1 and segment2, with a Cisco router. Your boss at Contoso is concerned about the cost, and wants to what the purpose of your action is.

What should you tell him?

A. It increases the number of collisions.
B. It decreases the number of broadcast domains.
C. It connects segment 1's broadcasts to segment 2.
D. It prevents segment 1's broadcasts from getting to segment 2.

75. Roger is setting up WAN connectivity between the Contoso New York and the Contoso Tokyo offices. He uses a uses two data link layer encapsulations, one for data and one for signaling. Which WAN Service does he use?

A. ISDN
B. Frame Relay
C. ATM
D. FDDI


Chúc các bạn vui vẻ,

[cuongnh]

Có Answer và Explanation không hả anh

[dangquangminh]

Hi

cuongnh có thể đưa ra phương án trả lời của một số câu mà bạn không sure. Mình và bạn sẽ thảo luận phương án trả lời.

Thân,

[sinhvienngheo]

3. Which of the following are characteristics of microsegmentation? (Choose two)

A. Dedicated paths between sending and receiving host are established
B. the number of collision domains is decreased
C. Broadcast domain are enlarged
D. Multiple subnetwork broadcast addresses are created
E. Multiple ARP tables are required on the connected hosts
F. Bandwidth is dedicated to connect hosts


END OF PART I.

Micro-segment làm tăng số collision domains. Phương án duy nhất là D: các địa chỉ broadcast cho từng mạng con được tạo ra.

Câu hỏi này khó đấy. Có ai có ý kiến gì khác không?

[titanevn]

B,C,E,F không hợp lý, theo tôi là A và D.

Đúng không vậy anh Minh ơi.

[dangquangminh]

[quote=dangquangminh]
3. Which of the following are characteristics of microsegmentation? (Choose two)

A. Dedicated paths between sending and receiving host are established
B. the number of collision domains is decreased
C. Broadcast domain are enlarged
D. Multiple subnetwork broadcast addresses are created
E. Multiple ARP tables are required on the connected hosts
F. Bandwidth is dedicated to connect hosts


.

quote]

Hi,

Khi chia một mạng thành nhiều segment, số lượng collision domain sẽ tăng. Đáp án B bị loại bỏ. Mỗi segment là một broadcast domain nên khi đó sẽ có nhiều broadcast domain được tạo ra. Phương án D được chọn. Mỗi broacast domain sẽ có kích thước nhỏ hơn trước nên phương án C bị loại bỏ. Bảng ARP trên từng host không phụ thuộc vào việc chia segment. Mỗi host chỉ có thể có 1 bảng ARP. Do đó phương án E bị loại bỏ. Phương án A được chọn do phương án F bị loại. Băng thông dành cho các host ko phụ thuộc vào phân segment.

Dù sao vẫn có thể có ý kiến khác. Mời mọi người tiếp tục trao đổi.

[cacodemon]

Anh Minh oi cho em hỏi hai :?: y nha. Em mới học CCNA nên cũng chưa giỏi lắm. Nhờ anh và các bạn :
1/ Which of the following describes a location from which a router is configured ?
A. After a router is installed on the network, it can be configured from virtual terminals.
B.Upon initial configuration, a router is configured from the virtual terminals.
C. After a router is installed on the network, it can be configured via modem from the console terminal.
D. Upon initial configuration, a router is configured via modem using the auxiliary port.

2/ Which of the following does not describes external configuration of routers ?
A. Upon initial configuration, a router is configured from the console terminal.
B. The router can be connected via modem using the console port.
C. After a router is installed, it is configured from the console terminal.
D. Configuration files can be downloaded from a TFTP server on the network.

[dangquangminh]

Hi

1. Sau khi router đã được cài đặt trong mạng, router có thể được truy cập bằng cách dùng telnet (virtual terminal). Bạn có thể chọn A. B và D cũng là hai chọn lựa tốt do router có thể đuọc cấu hình thông qua modem và các line vty.

2. Router cũng có thể nhận một file cấu hình từ một tftp server trên mạng. A and C.

[cacodemon]

Anh Minh cho em hỏi câu 2 chon A & D hay A & C.

[dangquangminh]

Hi,

Cách download một file cấu hình từ tftp-server được xem là external configuration. Do câu 2 hỏi kiểu cấu hình nào không phải (NOT) là external nên bạn không thể chọn D.

Chúc vui

[cacodemon]

Cám ơn anh Minh rất nhiều. Về học tiếp .... rồi sẽ hỏi anh nữa nha.

[cacodemon]

17. Exhibit:

Given the topology as illustrated, what commands are needed to configure IGRP on the Contoso1 Router? (Choose three)

A. Contoso1 (config ) # Router IGRP 100
B. Contoso1 (config) # router IGRP
C. Contoso1 (config - router) # network 192.168.6.0
D. Contoso1 (config - router) # network 192.168.7.0
E. Contoso1 (config - router) # network 192.168.8.0
F. Contoso1 (config - router) # network 192.168.9.0

Answer: A
Em chọn câu này có đúng ko các anh!
:roll: :roll: :roll: :roll: :roll:

[1'hpSky]

Hình của câu 17 đâu hả anh Minh, không có hình làm sao mà chọn được.
hi cocodemon! câu 17 phải chọn 3 đáp án.

[danguyennhi]

hi,

bạn phải chọn A và chọn thêm 2 câu lệnh còn lại. Hai câu lệnh còn lại sẽ phụ thuộc vào hình vẽ trong sơ đồ khi bạn đi thi. Option B không được chọn vì sai cú pháp.

thân mến,

[cacodemon]

17. Exhibit:

Given the topology as illustrated, what commands are needed to configure IGRP on the Contoso1 Router? (Choose three)

A. Contoso1 (config ) # Router IGRP 100
B. Contoso1 (config) # router IGRP
C. Contoso1 (config - router) # network 192.168.6.0
D. Contoso1 (config - router) # network 192.168.7.0
E. Contoso1 (config - router) # network 192.168.8.0
F. Contoso1 (config - router) # network 192.168.9.0

Answer: A
:roll: :roll: :roll: :roll: :roll:
Contoso1 có hai interface s0: ip 192.168.7,s1 ip 192.168.8.2
Contoso2 có 2 int s0 ip 192.168.8.2, s1 192.168.9.1

192.168.7.1 s0 Contoso1 :idea: <---> Contoso2 :idea: s1 192.168.9.1,s0 192.168.6.3
192.168.8.2 s1
Mấy bạn ơi có phải như dzầy ko?
Chọn A D E nha

[admin]

hi, ok.

[cacodemon]

4. Which statement describes the rule of split horizon?

A. Only routers can split boundaries (horizons) between concentric networks.
B. All distance vector protocols require fall back routers that may cause momentary loops as the topology changes.
C. Networks can only remain fully converged if all information about routers is sent out all active interfaces.
D. Information about a route should not be sent back in the direction from which the original update come.
E. Each AS must keep routing tables converged to prevent dead routes from being advertised across the AS boundary.

Câu này các bạn nghĩ sao. Theo mình là câu C. Nếu ko đúng nhờ các bạn help me!Sẽ cám ơn nhiều hơn nữa.

[danguyennhi]

Hi

Bạn nên chọn D. Luật split-horizon nói rằng một route không nên được gửi ngược lai nơi mà route đó đến.

Mến,

[cacodemon]

Thêm một đáp án nữa rồi, xin cám ơn bạn. Ua Dang Nguyen Nhi co bà con gì với Dang Quang ko v :?:

[cacodemon]

-
RouterA------------------------------------- RouterB--------------------------------------RouterC
(114.125.16.0/24, 116.226.46.0/24)----------------- (123.92.76.0/24,136.125.85.0/24)

6 What actions will occur after RouterA loses connectivity to network 114.125.16.0? (Choose two.)
A.RouterB will include network 123.92.76.0 and 136.125.85.0 in its update to RouterA.
B.During the next update interval, RouterB will send a RIP update out both ports that includes the inaccessible network.
C.During the next update interval, RouterC will send an update to RouterB stating that network 114.125.16.0 is accessible in 2 hops.
D.Router C will learn of the loss of connectivity to network 114.125.16.0 from RouterB.
E.RouterB will include network 123.92.76.0 and 136.125.85.0 in its update to RouterC.

Các bạn ơi ? :?:

[dangquangminh]

hi

Khi net 114.125.16.0 bị down, router C sẽ nhận được thông tin này từ router B. Do đó bạn nên chọn D. Đối với routerB, B sẽ gửi thông tin cập nhật route 114.125.10.0 như là inaccessible (không thể truy cập) ra các interface của nó. Tuy nhiên, cacodemon cần xem xét lại phương án chọn B do hình vẽ không rõ lắm.

mến,

[cacodemon]

Anh Minh, trên hình đó là Router A và Router C mỗi Router đều có hai (network address). Theo em nghĩ :
Khi 114.125.16.0 is down thì Router B sẽ thông báo cho những posts khác là mạng 114.125.16.0 is down. Đồng thời Router C cũng sẽ update được cái mạng 114.125.16.0 bị down. :P Vậy đáp án là câu B & D đúng ko anh?. :(
Cho em hỏi nếu trường hợp này có được ko a? During the next update interval,Router C will send an update to RouterB stating that network 114.125.16.0 is accessible in 2 hops.

[phamgiy]

3. Which of the following are characteristics of microsegmentation? (Choose two)

A. Dedicated paths between sending and receiving host are established
B. the number of collision domains is decreased
C. Broadcast domain are enlarged
D. Multiple subnetwork broadcast addresses are created
E. Multiple ARP tables are required on the connected hosts
F. Bandwidth is dedicated to connect hosts


Anh Minh ơi !!!
Theo Em nghĩ thì câu này phải là B&D thì mới đúng chứ, theo Em nghĩ thì hình như có sự nhầm lẩn giữa "collision domains" và "domanin" .số lượng domain thì tăng lên , còn collision thì giảm xuống .......Hay hai khái niệm này chỉ là một thôi .Còn câu A thì .....hình như chả dính dáng gì tới câu hỏi này cả(Em đọc cả buổi mà củng không dịch được ý câu này là gì nữa......chỉ lơ mơ màng thôi) Mong Anh Chị Em chỉ giáo thêm vậy

[danguyennhi]

đã có những thảo luận bất tận về collison domain và broadcast domain ở đây:

Phân biệt collision domain và broadcast domain?
http://www.vnpro.org/forum/viewtopic.php?t=2335
http://www.vnpro.org/forum/viewtopic.php?t=1227&view=previous
http://www.vnpro.org/forum/viewtopic.php?t=991&view=previous

[cacodemon]

-
RouterA----------------------------- RouterB---------------------------RouterC
(114.125.16.0/24, 116.226.46.0/24)----- (123.92.76.0/24,136.125.85.0/24)

6 What actions will occur after RouterA loses connectivity to network 114.125.16.0? (Choose two.)
A.RouterB will include network 123.92.76.0 and 136.125.85.0 in its update to RouterA.
B.During the next update interval, RouterB will send a RIP update out both ports that includes the inaccessible network.
C.During the next update interval, RouterC will send an update to RouterB stating that network 114.125.16.0 is accessible in 2 hops.
D.Router C will learn of the loss of connectivity to network 114.125.16.0 from RouterB.
E.RouterB will include network 123.92.76.0 and 136.125.85.0 in its update to RouterC.

Các bạn ơi ? :?:

Router A có 2 interface: 114.125.16.0/24, 116.226.46.0/24
Router C có 2 interface: 123.92.76.0/24,136.125.85.0/24
danguyennhi ơi bạn thấy câu C ở đây có được ko? Nếu mình chọn nó là câu trả lời với câu D. :roll:

[admin]

Hi cacodemon

luật split-horzon nói rằng một router sẽ không quảng bá ngược lại một route mà từ đó route được được nhận. trên sơ đồ của cacodemon, net 114.125.16.0 là do B quảng bá đến. Do đó C sẽ không bao giờ quảng bá ngược lại route 114.125.16.0 về lại cho B.

thân,

[Nokia6610]

1.Which statement describes the routing protocol OSPF (choose 3)

A.It supports VLSM
B.It is used to between Autonomous systems
C.It confines network instability to one area of network
D.It increases routing overhead over the network
E.It allows extensive control of the routing update
F.it is simpler to configure than RIPv2

Answer : A D E

[Nokia6610]

2. Error detection schemes use which field of frame to detect error?

A.MTU
B.MAC
C.FCS
D.PDU
E.ERR
F. Flag

Answer C

[danguyennhi]

1.Which statement describes the routing protocol OSPF (choose 3)

A.It supports VLSM
B.It is used to between Autonomous systems
C.It confines network instability to one area of network
D.It increases routing overhead over the network
E.It allows extensive control of the routing update
F.it is simpler to configure than RIPv2

Answer : A D E

Anh nên chọn A, C và E. Anh không nên chọn D vì OSPF theo một nghĩa nào đó sẽ giảm routing overhead của hệ thống mạng. OSPF dùng hello protocol và chỉ gửi các LSA nên routing update sẽ nhỏ hơn so với RIP.

[kokichi81]

Theo mình thì nên chọn A,D,E.Vì khác với RIP hay IGRP chỉ truyền routing update tới các neighbour router,còn OSPF truyền routing update trên toàn mạng , điều đó dẫn đến việc tăng lưu lượng định tuyến trên mạng.

[baprang]

em có ý kiến :

1. sao anh Minh ko ZIP file rồi cho mội người DL dễ hơn ko?
2. sao anh Minh ko đưa hết tất cả các câu hỏi thi CCNA mà anh đã có lên 1 lần luôn mà anh fải đưa lên nhìu lần như vậy nhỉ?

thân

[dangquangminh]

hi

- đưa thành nhiều lần để hy vọng là mọi người sẽ đọc. Nếu đưa ngay 300 câu thì e rằng không ai đọc.
- mục đích chính là có một thread để mọi người có thể đặt ngay câu hỏi và thảo luận.

thân,

[dangquangminh]

kokichi

rip hoặc igrp sẽ gửi các update đến các routers neighbor nhưng update này là FULL ROUTING TABLEs. Kích thước của một FULL ROUTING TABLE là khá lớn. OSPF sẽ multicast các LSA/LSU. Các LSA/LSU thông thường chỉ được gửi khi có network topology thay đổi. Ngoài ra, ở trạng thái bình thường, OSPF chỉ gưỉ các hello-packet với kích thước rất nhỏ.

thân

[1'hpSky]

Anh Minh nói chưa hết, các update của OSPF là incremental update, được gửi đi khi có một sự thay đổi nào đó, các incremental update này chỉ chứa thông tin về sự thay đổi đó nên kích thước gói tin là nhỏ (nhỏ hơn nhiều so với toan bộ routingtable trong RIP, IGRP).

Còn nữa,

Theo mình thì nên chọn A,D,E.Vì khác với RIP hay IGRP chỉ truyền routing update tới các neighbour router,còn OSPF truyền routing update trên toàn mạng , điều đó dẫn đến việc tăng lưu lượng định tuyến trên mạng.
như thế nào là truyền routing update trên toàn mạng??? Với RIP và IGRP sau khi nhận được update, router sẽ tiếp tục thông báo đến cho các router neighbor của mình, như thế có phải là toàn mạng không!!!

[titanevn]

50. Which of the following describe router functions? (Choose three)

A. Packet switching
B. Collision prevention on a LAN segment
C. Packet filtering
D. Broadcast domain enlargement
E. Broadcast forwarding
F. Internet work communication


theo tuanevnit: A, E, F

B sai vì nó là nhiệm vụ của Switch
C có thể đúng nhưng phải dùng ACL
D: chưa biết

anh Minh thấy thế nào ạ?

[titanevn]

49. The following access list was applied outbound on he E0 interface connected to the 192.168.1.8/29 LAN: access-list 123 deny tcp 192.168.1.8 0.0.0.7 eq 20 any access- list 123 deny tcp 192.168.1.9 0.0.0.7 equal 21 any What effect will this access list have?

A. All traffic will be allowed to exit E0 except FTP traffic.
B. FTP traffic from 192.168.1.22 to any host will be denied.
C. FTP traffic from 192.168.1.9 to any host will be denied.
D. All traffic exiting E0 will be denied.
E. All FTP traffic to network 192.168.1.8/29 from any host will be denied.


Câu 29: Trả lời là E, hiển nhiên đúng!

[titanevn]

44. Which of the following statements regarding routed and routing protocols are true? (Choose two)

A. A routed protocol is assigned to an interface and determines the method of packet deliver.
B. A routing protocol determines the path of a packet through a network.
C. A routed protocol determines the path of a packet through a network.
D. A routing protocol operates at the transport layer of the OSI model.
E. A routed protocol updates the routing table of a router.

Đáp án theo ý kiến của tuanevnit:

E và B.

[titanevn]

45. What should the configuration register value be after successfully completing the password recover procedure and returning the router to normal operation?

A. 0x2100
B. 0x2101
C. 0x2102
D. 0x2124
E. 0x2142

Thật sự là tuanevnit không nhớ lắm về các giá trị của thanh ghi khởi động của Router, anh Minh có thể liệt kê các giá trị có thể gặp và ý nghĩa của nó cho chúng em được không?

[titanevn]

27. Contoso.com has allocated the IP add 199.144.27.0 is its network, to provide flexibility for the LAN design, a subnet mask of 255.255.255.240 has been chosen. Which of the following address can be assigned to LAN on the resulting subnets (Choose three)

A. 199.141.27.33
B. 199.141.27.112
C. 199.141.27.119
D. 199.141.27.126
E. 199.141.27.175
F. 199.141.27.208

B --> Subnet ID --> bỏ
E --> Broadcast --> bỏ
F --> Subnet ID --> bỏ

Còn lại: A,C,D --> đáp án là A,C,D

28. You are configuring a new Catalyst switch that you want to manage remotely from workstations on other network segments within your enterprise. Which of the following are required to allow remote management of the switch over IP? (Choose two)

A. The switch name must match the workgroup name of the local network.
B. The switch must be configured with an IP address and default gateway.
C. The remote workstations must have access to the management VLAN of the switch.
D. CDP must be enabled on the switch so that it can be located by other devices on the network.

Ans: B and C, B là chắc chắn rùi, còn C chưa chắc lắm.


31. New switches have been purchased for a network upgrade. The objective for the network design emphasizes efficient, error-free transport instead of fast transport. Which switching mode should be configured on the new switches to provide error-free transport to the network?

A. cut-through
B. fragment-free
C. frame-filtering
D. store-and-forward
E. 802.1q forwarding
F. VTP transparent mode

Ans: D, chưa dám chắc lắm, xin anh Minh confirm.


35. Given a subnet mask of 255.255.255.224, which of the following addresses can be assigned to network hosts? (Choose three)

A. 15.234.118.63
B. 92.11.178.93
C. 134.178.18.56
D. 192.168.16.87
E. 201.45.116.159
F. 217.63.12.192

A,E --> Broadcast
F: Subnet ID
B,C,D --> Ans

36. Which of the following host addresses are member of networks that can be routed across the public Internet? (choose all that apply)

A. 10.172.13.65
B. 172.16.223.125
C. 172.64.12.29
D. 192.168.23.252
E. 198.234.12.95
F. 212.192.48.254
Ans: C, E, F

41. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location? (Choose two)

A. The switch must be configured with an IP address, subnet mask, and default gateway.
B. The switch must be connected to a router over a VLAN trunk.
C. The switch must be reachable through a port connected to its management VLAN.
D. The switch console port must be connected to the Ethernet LAN.
E. The switch management VLAN must be created and have a membership of at least one switch port.
F. The switch must be fully configured as an SMTP agent.

Ans: A,C


42.
The network administrator of the Contoso1 router adds the following command to the router configuration:

ip route 192.168.12.0 255.255.255.0 172.16.12.1

What are the results of adding this command? (Choose two)

A. The command establishes a static route.
B. The command invokes a dynamic routing protocol for 192.168.12.0.
C. Traffic for network 192.168.12.0 is forwarded to 172.16.12.1.
D. Traffic for all networks is forwarded to 172.16.12.1.
E. This route is automatically propagated throughout the entire network.

Ans: A, C

43. What is the subnet work address for a host with IP address 201.100.5.68/28?
A. 201.100.5.0
B. 201.100.5.32
C. 201.100.5.64
D. 201.100.5.65
E. 201.100.5.31
F. 201.100.5.1

D,E,F --> wrong
Ans: C


Sửa câu 27

[dangquangminh]

50. Which of the following describe router functions? (Choose three)

A. Packet switching
B. Collision prevention on a LAN segment
C. Packet filtering
D. Broadcast domain enlargement
E. Broadcast forwarding
F. Internet work communication


theo tuanevnit: A, E, F

B sai vì nó là nhiệm vụ của Switch
C có thể đúng nhưng phải dùng ACL
D: chưa biết

anh Minh thấy thế nào ạ?

Hi

Router không làm chức năng broadcast forwarding; ngược laị router là broadcast firewalling. Do đó E không phải là một chọn lựa tốt. Router có khả năng thực hiện packer filter nên phương án sau cùng (theo mình) là A,F và C.

Ở câu 49 về access-list, tuấnevn đã quên mất một chi tiết là trong các access-list, mặc định sẽ có một phát biểu DENY ở cuối cùng. Do đó trong access-list sau:

access-list 123 deny tcp 192.168.1.8 0.0.0.7 eq 20 any
access- list 123 deny tcp 192.168.1.9 0.0.0.7 equal 21 any

Nếu access-list trên apply vào một interface nào đó, mọi traffic sẽ bị deny. Do đó, E không phải là một chọn lựa tốt.

Ở câu 44, routed protocol được gán vào các interface. Việc gán địa chỉ này giúp cho các packet có thể được phân phối. Routing protocol giúp các packet có thể được truyền trên mạng. Phương án chọn lựa tốt là A và B.

Thân,

[titanevn]

Có nghĩa là nếu có:

permit any any

ở cuối thì câu trả lời của em mới đúng phải không? híc híc, sơ ý quá

[dangquangminh]

31. New switches have been purchased for a network upgrade. The objective for the network design emphasizes efficient, error-free transport instead of fast transport. Which switching mode should be configured on the new switches to provide error-free transport to the network?

A. cut-through
B. fragment-free
C. frame-filtering
D. store-and-forward
E. 802.1q forwarding
F. VTP transparent mode

Ans: D, chưa dám chắc lắm, xin anh Minh confirm.

Trong các cơ chế switch, kiểu store-and-forward là đảm bảo các lỗi truyền frame ít xảy ra nhất. Do đó bạn chọn D là một đáp án chính xác.

Thân,

[nngoc_huong]

Dear Mr Minh!
Anh có thể giải thích câu 27 ,cách tính như thế nào ?Em mới bắt đầu học ccna (Em học lớp ccna buổi chiều thứ 7 và cn)

[titanevn]

27. Contoso.com has allocated the IP add 199.144.27.0 is its network, to provide flexibility for the LAN design, a subnet mask of 255.255.255.240 has been chosen. Which of the following address can be assigned to LAN on the resulting subnets (Choose three)

A. 199.141.27.33
B. 199.141.27.112
C. 199.141.27.119
D. 199.141.27.126
E. 199.141.27.175
F. 199.141.27.208

B --> Subnet ID --> bỏ
E --> Broadcast --> bỏ
F --> Subnet ID --> bỏ

Còn lại: A,C,D --> đáp án là A,C,D

[cacodemon]

Giúp em câus này nha
1. When a host receives a data segment, what allows the host to determine which application should receive the segment?
A. IP source address
B. IP destination address
C. PAR
D. sliding window
E. port number
F. SYN packet
Answer: F

2. What is the purpose of the three-way handshake that occurs between hosts using TCP as the transport layer protocol?

A. to determine the number of packets that can be sent before an acknowledgment is required
B. to allow a host to forward data to a router
C. to establish a round trip connection between sender and receiver before data is transferred
D. to provide a mechanism for data encryption and compression
Answer: C

3.Which of the following describes how TCP adds reliability to communication? (Choose two.)

A. Hosts using TCP set up virtual circuits at the beginning of the transmission using the three-way handshake.
B. Hosts using TCP set the error-checking frequency at the beginning of the transmission and maintain this frequency for the duration.
C. The receiving host acknowledges that it has received the expected number of segments and requests additional data.
D. The receiving host acknowledges any incorrectly received data and requests retransmission of damaged or missing bytes
Answer: A & D

4.What is used by UDP to determine if the data or header has been transferred without corruption?

A. lower layer protocols
B. checksum
C. PAR
D. sliding window
E. acknowledgment and retransmission
F. IP
Answer: B

5.What is the purpose of Positive Acknowledgment and Retransmission (PAR)?

A. PAR allows the presentation layer to request that data be resent in a format the destination host can process.
B. PAR provides a mechanism for the receiving device to request that all segments be retransmitted if one segment is corrupt.
C. PAR helps ensure that a number of data segments sent by one host are received by another host before additional data segments are sent.
D. PAR is used to renegotiate the window size during the synchronization process
Answer: C

[admin]

1. Port sẽ xác định ứng dụng nào sử dụng data segment. Do đó, để xác định ứng dụng nào (applications) dùng một data segment, cần xem port được chứa trong header của segment đó. Do đó, câu 1 bạn nên chọn E

3. Host nhận sẽ ACK những segments mà nó nhận đúng. Do đó bạn nên chọn A và C

Thân chúc cacodemon học giỏi,

[cacodemon]

:P Cám ơn Admin nhiều nhiều, hỏi nữa nha.
1. Which statement is true regarding the TCP protocol?

A. Flow control at the transport layer is provided by adding a sequence number to each segment.
B. A sliding window allows for communicating devices to negotiate the amount of unacknowledged data that can be sent.
C. A window size of 1 would require a receiving device to send ACK 1 after the Segment 1 has been received.
D. TCP is used by sending hosts to segment large data files prior to transmission while IP is used by receiving host to reassemble the smaller segments.
Answer: C
2. How are originating source port numbers assigned during the data encapsulation process?

A. assigned manually by the user when starting the application
B. assigned dynamically by the source host
C. assigned by the routing protocol during the lookup process
D. assigned by the destination host during session negotiation
Answer: B

3. What is the purpose of using port numbers in the transport layer?

A. to identify the segment as being either TCP or UDP
B. to provide reliability during data transport
C. to identify the interface port number used by the router when forwarding data
D. to track multiple conversations that occur between hosts
Answer: D

4. During the encapsulation process, in which order are the IP address, MAC address, and port number assigned when the router is establishing communication with the TFTP server?

A. IP address, MAC address, port number
B. MAC address, IP address, port number
C. port number, IP address, MAC address
D. port number, MAC address, IP address
Answer: B or D câu này em quên rồi

5. Which transport layer unit of information places the port number in the header?

A. data
B. segment
C. packet
D. frame
E. bit
Answer: E

6. Soure port:1406 Destination port:80 Sequence#:2563987 ACK#:4679 Window:8192 Data
What type of segment and data is shown in the graphic?

A. a UDP segment carrying e-mail traffic
B. a TCP segment carrying FTP traffic
C. an IP segment carrying FTP traffic
D. a UDP segment carrying web traffic
E. a TCP segment carrying web traffic
F an IP segment carrying e-mail traffic
Answer: E
7. Which of the following describes a type of denial of service attack designed to exploit the normal function of the TCP three-way handshake?

A. A host sends a packet with a spoofed source IP address.
B. A host sends a packet with an incorrect destination IP address.
C. A source sends a packet containing a garbled header.
D. A host sends an oversized packet that fills the memory buffers of the destination host.
E. A host sends a packet that contains a virus.
F. A host sends a packet that contains a worm.
Answer: A

8. At which point in the transmission process are segments numbered?

A. when received
B. when reassembling
C. before transmission
D. while negotiating window size
Answer: C
:lol:

[danguyennhi]

4. Thứ tự xử lý là port number, IP address, MAC addresses. Do đó C.
5. B segment đặt port-number trong header

[cacodemon]

1. Which statement is true regarding wildcard masks?

A. The wildcard mask and subnet mask perform the same function.
B. The wildcard mask is always the inverse of the subnet mask.
C. A "0" in the wildcard mask identifies IP address bits that must be checked.
D. A "1" in the wildcard mask identifies a network or subnet bit.
Answer: C
2. Which of the following describe types of port numbers that can be represented in the header of TCP and UDP segments? (Choose two)
A. connectionless
B. well-known
C. operational
D. dynamic
E. static
Answer: A & D

3.
access-list 147 deny tcp 172.16.0.0 0.0.255.255 any eq 23
access-list 147 permit ip any any

Assuming the ACL in the graphic is correctly applied to an interface, what effect will the ACL have on network traffic?

A. All traffic to network 172.16.0.0 will be denied.
B. All TCP traffic will be permitted to and from network 172.16.0.0.
C. All telnet traffic from the 172.16.0.0 network to any destination will be denied.
D All port 23 traffic to the 172.16.0.0 network will be denied.
E. All traffic from the 172.16.0.0 network will be denied to any other network.
Answer: D
4.
access-list 120 deny tcp host 192.168.15.4 any eq 21

Assuming the ACL in the graphic is correctly applied to an interface, what effect will this ACL have on network traffic?

A. Host 192.168.15.4 will be denied ftp access to any destination, but will be permitted all other access.
B. All ftp traffic to host 192.168.15.4 will be denied.
C. All traffic from that interface will be denied.
D. No traffic will be denied because a "permit" statement does not exist in this ACL.
Answer : C

5. Select the correct statements about extended ACLs. (Choose two)

A. Extended ACLs use a number range from 1-99.
B. Extended ACLs end with an implicit permit statement.
C. Extended ACLs evaluate the source and destination addresses.
D. Port numbers can be used to add greater definition to an ACL.
E. Multiple ACLs can be placed on the same interface as long as they are in the same direction.
Answer : B, C, E

[cacodemon]

4. Thứ tự xử lý là port number, IP address, MAC addresses. Do đó C.
5. B segment đặt port-number trong header

:Fade-col: Thanks you very much.

[Nokia6610]

Hi Danguyennhi.
Bạn có thể giải thích vì sao chọn C không ?
Theo mình biết, OSPF ra đời sau 2 chú RIP, IGRP nên việc tăng Overhead over network là đúng. ( OSPF xài loại Router yêu cầu xịn hơn)

Có ai có ý khác không nhỉ .?

[Jindo]

các bạn ơi cho mình hỏi trả lời bài test này như thế nào nhỉ?(xem file đính kèm)
cám ơn nhiều

[minhchi]

b,e,f

[nth14026]

Bạn chọn câu: B, E và F nha.

Thân chào

Bye bye
N.T.H

[Jindo]

các bạn co thể giải thích cho mình được không ?
Thanks,.

[nth14026]

Bạn ơi !

Câu hỏi này liên quan đến phần chia IP Subnet. Bạn tham khảo trong giáo trình ICND đó.

Thân

[daredevilk]

Hình của bạn đưa sai rồi.
Vì 192.168.82.90 là lớp C do đó nó phải có tổng số bít >=24 mà hình lại cho là 20 là sai.Bạn xem lại coi
Do đó chỉ có 2 câu đúng thôi.

[NgHanh]

cái đó kô liên quan tới câu hỏi. người ta nói tìm broadcast add thì cứ coi trong đống câu trả lời, cái nào là broad add thì chọn thui.

[kid_of_god_2003]

theo mình có cách tính nhanh mà mình đã áp dụng trong kỳ thi:
Theo hình vẽ, mạng 172 thuộc lớp B ( dáng lẽ dùng 16 bit đầu tiên làm subnet), nhưng đầu bài cho là /20 nên nó mượn 4 bit thuộc phần host làm subnet:
1111111.11111111.11110000.00000000
~ 255 .255 .240 .0
bạn lấy 256 - 240 = 16 như vây mỗi subnet sẽ cách nhau 16 đơn vị (không để ý đến octec cuối cùng)- các subnet của bạn sẽ là 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192, 208, 224, 240 (~ 2^4=16 subnet, chú ý số subnet có thể dùng được = 2^4 -2 =14 --loại bỏ subnet đầu và cuối)
Để tính địa chỉ broadcast (địa chỉ của tất cả các bit thuộc phần host =1) , bạn lấy địa chỉ subnet trừ đi 1 đơn vị tức là 15, 31, 47, 63, 79, 95, 111, 127, 143, 159, 175, 191, 207,223,239 (phần octec cuối tất nhiên là 255 rồi)

Do vậy đáp án đúng là B,E,F

Tương tự bạn có thể tính với việc mượn 3 bit địa chỉ: Ví dụ như /19
1111111.11111111.11100000.00000000
~ 255 .255 .224 .0
Bạn lấy 256 - 224 = 32 như vây mỗi subnet sẽ cách nhau 32 đơn vị (không để ý đến octec cuối cùng)- các subnet của bạn sẽ là 32, 64, 96, 128, 144, 160, 192, 224
(~ 2^3=8 subnet, số subnet có thể dùng được = 2^3 -2 =6 --loại bỏ subnet đầu và cuối)
địa chỉ broadcast tương ứng sẽ là 31, 63, 95, 127, 143, 159, 191, 223

[bruno1812]

Daredevil nên xem lai đi, dây là mình đang nói đên subnet, có nghĩa là classless, không phải chia subnet như bạn nói đâu. Nên xem kỹ trước khi nói nhé.

[milovn]

Nhờ anh Minh và các bạn giải dùm câu này:

1. Which of the following "network" commands following the command "router ospf 1" tells the Router to start using OSPF on Interfaces with IP addresses are 10.1.1.1, 10.1.100.1, and 10.1.120.1? (choose only one)

A. network 0.0.0.0 25.255.255.255 area 0
B. network 10.0.0.0 0.255.255.0 area 0
C. network 10.1.1.0 0.x.1x.0 area 0
D. network 10.1.1.0 255.0.0.0 area 0
D. network 10.0.0.0 255.0.0.0 area 0

Cảm ơn nhiều.

[kid_of_god_2003]

B. network 10.0.0.0 0.255.255.0 area 0

[sinhvienngheo]

theo mình bạn nên chọn A.

[milovn]

Cảm ơn các bạn đã trả lời!

kid_of_god_2003 và SVN có thể giải thích dùm milovn về phương án lựa chọn của mình được không?

Mới nhìn thì đáp án B có vẻ có lý, nhưng với wildcard 0.255.255.0 thì milovn thấy hơi lạ. Đáp án cho câu hỏi này theo người ra đề là A, nhưng milovn cũng không hiểu tại sao lại chọn A luôn :( ???

[dangquangminh]

hi

giá trị 0.0.0.0 255.255.255.255 có ý nghĩa là 'tất cả các network'. Do đó trong câu hỏi

1. Which of the following "network" commands following the command "router ospf 1" tells the Router to start using OSPF on Interfaces with IP addresses are 10.1.1.1, 10.1.100.1, and 10.1.120.1? (choose only one)

lệnh network 0.0.0.0 25.255.255.255 area 0
có ý nghĩa là cho phép tất cả các interfaces trong routers chạy OSPF.

Các đáp án còn lại không có giá trị nào match đúng với 3 địa chỉ nêu trên.

thân

[milovn]

Cảm ơn bác Minh nhiều!
Thêm một câu khác: What the differences and similarities between bridges and switches are? (Choose all that apply)

A. Bridges are faster learners than switches due to fewer ports.
B. Bridges and switches increase the size of a collision domain.
C. A bridge will forward a broadcast but a switch will not.
D. Bridges and switches learn MAC addresses through examining the source MAC address.
E. A switch is a uniport bridge.

Thanks

[nth14026]

Câu D là đúng.

[milovn]

Hi nth14026,

Theo milovn thì câu đúng là B và D; nhưng đáp án lại là B và C. Nhờ các bạn giả thích dùm nhé.

Cảm ơn nhiều.

[nth14026]

Chào milovn.

Câu này bạn xem trong phần ******** phải không?
Mình đã gặp câu hỏi này trong phần thi CCNA của mình, nhưng câu E thì nó thay thế từ uniport bằng từ multiport (đề nó viết sai đó). Nên đán án đúng theo mình là câu D và E. (Mình cũng đã tham khảo câu trả lời từ các thầy dạy học mình đó).

Thân chào

[milovn]

Chào nth14026,

Đây đúng là một câu trong ********. Giờ thì mình đã hiểu câu này rồi. Cảm ơn bạn nhiều nhé. Quả thật là ******** có nhiều câu rất chuối...

[nth14026]

Chào bạn milovn

Đúng rồi đó, trong ******** có khoảng gần 10% là trả lời sai hoặc do đề không rõ ràng. Tuy nhiên với mục đích là tham khảo các câu hỏi trong kỳ thi của Cisco thì ******** vẫn tốt đấy. Theo mình nghĩ thì nên hiểu các dạng câu hỏi và câu trả lời trong ********, đừng nên học thuộc lòng hoặc nhớ nó.
Chúc bạn luôn gặp nhiều may mắn !

Thân chào

[hard]

QUESTION NO: 115
OSPF routing makes use of areas. What are the characteristics of these areas? (Choose all that apply.)
A. Hierarchical OSPF networks do not need multiple areas
B. Multiple OSPF areas must connect to area 0
C. Single area OSPF networks must be configured in area 1
D. Areas can be assigned any number from 0 to 63535
E. Area 0 is called the backbone area
F. Each OSPF area need to be configures with a loopback interface
Answer: B, C, E
Explanation
In multiple area OSPF networks, all areas must connect to th backbone area which is disgnated Area 0. In
Single area OSPF networks, there is no backbone,. There fore the Area is designated Area 1



Theo mình thì chọn câu: A,B,D không biết có đúng không.

[hard]

sory, minh chon b,d,e

[sinhvienngheo]

hard nên chọn B,D và E vì "C. Single area OSPF networks must be configured in area 1" không hợp lý. Nếu OSPF dùng single area thì area đó không bắt buộc (must) phải là area 1. Các chọn lựa còn lại là hợp lý. Trong OSPF, tất cả các area phải nối về area 0. Area 0 gọi là backbone area. Nếu một area nào đó không thể kết nối về area 0, dùng virtual-link.

[calvin.nguyen]

21. The Frame relay circuit between Contoso1 & Contoso2 is experiencing congestion. Which type of notification are used to alleviate the congestion? (Choose three)

A. FECN
B. CIR
C. BECN
D. DE
E. DLCI 100 is Down


Mình chọn A,C, D. Các bạn nghĩ thế nảo

[sinhvienngheo]

Có 3 dạng frame đặc biệt được FRswitch gửi ra khi có nghẽn (congestion) xảy ra:

FECN: là frame được gửi đến đích
BECN: là frame được gửi đến nguồn phát, thông báo về hiện tượng nghẽn.
Các frame DE: là các frame hợp lệ cho quá trình DROP nhằm giảm bớt băng thông của đường truyền.

Cám ơn calvin đã tham gia thảo luận,

[calvin.nguyen]

37. Which connections allow the use of full-duplex Ethernet? (Choose three)

A. Switch to host
B. Switch to switch
C. Hub to hub
D. Switch to hub
E. Host to host

Câu A, B, E là đụng Tại vì HUB chỉ có dùng Half Duplex.

[calvin.nguyen]

41. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location? (Choose two)

A. The switch must be configured with an IP address, subnet mask, and default gateway.
B. The switch must be connected to a router over a VLAN trunk.
C. The switch must be reachable through a port connected to its management VLAN.
D. The switch console port must be connected to the Ethernet LAN.
E. The switch management VLAN must be created and have a membership of at least one switch port.
F. The switch must be fully configured as an SMTP agent.

Câu trã lời: A & E . Câu C sai là vì thông thường Management Interface của switch là logical interface (SC0 interface hay là Loopback Interface) do đó không cần phãi truy cap vao no qua switch port.

[calvin.nguyen]

47. Five new routers need to be configured quickly for testing. While connected to a router by console, the administrator copies and pastes a configuration from e text file, a part of which is shown in the exhibit, into the HyperTerminal window. Why would host 192.168.10.10/29 be unable to ping the Ethernet interface of the router as a result of this procedure?

A. The new configuration needs to be saved to the NVRAM before the changes take effect.
B. The router needs to be reloaded before the changes are implemented.
C. The Ethernet network does not show up in the routing table because the RIP configuration is incomplete.
D. The copied configuration did not overwrite the shutdown command on the Ethernet interface.
E. The subnet mask on the router prevents the host from communicating with it.

Cau trả lòi là D.

[dangquangminh]

Trong qui trình cấu hình router, người admin có thể copy và dán cấu hình từ một text-file vào config mode của router. Một điều cần chú ý trong qui trình này là phải enable các interface của routers thì các interfaces mới hoạt động như mong muốn. Khi gặp câu hỏi dạng này, người dự thi cần chú ý đọc exibit kèm theo của câu hỏi, kiểm tra là có lệnh NO SHUTDOWN trong các interface configuration hay không? Nếu không, D là một chọn lựa hoàn hảo.

Cám ơn anh đã tham gia thảo luận,

[calvin.nguyen]

52. Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?

A. frame-relay arp
B. frame-relay map
C. frame-relay interface-dlci
D. frame-relay lmi-type
53. Exhibit:

Mình chọn câu B. Lệnh frame-relay interface-dlci chỉ được dùng vói Subinterface thoi; còn frame-relay map đều sủ dụng được vói physical interface và subinterface .

[calvin.nguyen]

68. You are working as a network technician at Contoso. You are required to troubleshooting the WAN link between the Contoso main office at Boston and the Contoso remote office at Rio De Janeiro. A Cisco router that was providing Frame Relay connectivity at the Rio de Janeiro site as replaced with a different vendor's frame relay router. Connectivity is now down between the Boston and Rio De Janeiro site.
What is the most likely cause of the problem?

A. Mismatched LMI types.
B. Incorrect DLCI.
C. Mismatched encapsulation types.
D. Incorrect IP address mapping.



Câu A . Cisco LMI dùng DLCI 1023 còn ITU và ANSI dùng DLCI 0.

[calvin.nguyen]

75. Roger is setting up WAN connectivity between the Contoso New York and the Contoso Tokyo offices. He uses a uses two data link layer encapsulations, one for data and one for signaling. Which WAN Service does he use?

A. ISDN
B. Frame Relay
C. ATM
D. FDDI

Câu C. vpi/vci 0/5 dùng cho signalịng .

[bruno1812]

Theo mình nghĩ thì A, C, E. Vì OSPF là link-state protocol, nó sử dụng trigger-update, không phải gửi toàn bộ routing table, vả lại cũng chỉ update đến những router nào sử dụng chung routing protocol với nó. Trong câu C " it confines network instability to one area of network", OSPF sử dụng area 0 là backbone area của network. Mình nghĩ là nó đúng hơn là câu D.

[dangquangminh]

75. Roger is setting up WAN connectivity between the Contoso New York and the Contoso Tokyo offices. He uses a uses two data link layer encapsulations, one for data and one for signaling. Which WAN Service does he use?

A. ISDN
B. Frame Relay
C. ATM
D. FDDI

ISDN có phải là một chọn lựa tốt hơn?

[calvin.nguyen]

Lúc đầu mình chọn ISDN nhưng vì câu hỏi là Data Link Layer Encapsulation nên mình chọn là ATM, tại mình nghĩ la Q931 và q921 là Layer 2 protocol không phải là Layer 2 Encapsulation . Thank you Minh.

[danguyennhi]

68. You are working as a network technician at Contoso. You are required to troubleshooting the WAN link between the Contoso main office at Boston and the Contoso remote office at Rio De Janeiro. A Cisco router that was providing Frame Relay connectivity at the Rio de Janeiro site as replaced with a different vendor's frame relay router. Connectivity is now down between the Boston and Rio De Janeiro site.
What is the most likely cause of the problem?

A. Mismatched LMI types.
B. Incorrect DLCI.
C. Mismatched encapsulation types.
D. Incorrect IP address mapping.

Câu A . Cisco LMI dùng DLCI 1023 còn ITU và ANSI dùng DLCI 0.

Hi

Do site ở Rio thay thế bằng một router frame relay của một vendor khác nên khả năng vấn đề lớn nhất nằm ở vấn đề LMI mismatch.

Chúc vui

[mmx]

Một vài trả lời thế này, admin và mọi người đánh giá giúp với:
51 - D
54 - D,E,F
55 - A
56 - B,C
57 - A,B,D
58 - A
59 - C
60 - C,D,E
61 - D,E
63 - D
64 - Admin xem lại câu hỏi này(hình như có vấn đề)
70 - A
71 - B,C
72 - D
73 - D
74 - D

[govap]

hi

câu 57:

57. Routercs# show ip route

Codes: C-connected, s-static, l -IGRP, R -RIP, M -mobile, B -BGP, D -EIGRP, EX - EIGRP external, O -OSPF, IA -OSPF inter area, EI -OSPF external type 1, E2 -OSPF external type 2, E -EGP, i -IS-IS, L1 -IS-IS level-1, L2 -IS-IS level-2, * -candidate default, U - per-user static route
Gateway of last resort is not set
R 202.30.8.0 /24[120/1] via 202.30.2.2, 00:00:10, Serial 0
C 202.30.9.0 /24 is directly connected, Serial 1
R 202.30.10.0 /24 [120/7] via 202.30.9.1, 00:00:02, Serial 1
R 202.30.11.0 /24 [120/7] via 202.30.9.1, 00:00:03, Serial 1
C 202.30.1.0 /24 is directly connected, Ethernet 0
C 202.30.2.0 /24 is directly connected, Serial 0
R 202.30.3.0 /24 [120/1] via 202.30.2.2, 00:00:10. Serial 0
R 202.30.4.0 /24 [120/15/ via 202.30.2.2, 00:00:10, Serial 0
R 202.30.5.0 /24 [120/15] via 202.30.2.2, 00:00:10, Serial 0
R 202.30.6.0 /24 [120/15] via 202.30.2.2, 00:00:10, Serial 0
R 202.30.7.0 /24 [120/1] via 202.30.2.2, 00:00:10, Serial 0

You examine the routing table of your router named Routercs. This routing table will be send to neighboring routers via broadcasts. Some routes might be discarded and not entered in to the routing tables of the neighboring RIP routers. Which of the following routes would be discarded in this way?

A. R 202.30.8.0/24 [120/1] via 202.30.2.2, 00:00:10, Serial0
B. R 202.30.11.0/24 [120/7] via 202.30.9.1, 00:00:03, Serial1
C. C 202.30.1.0/24 is directly connected, Ethernet0
D. R 202.30.5.0/24 [120/15] via 202.30.2.2, 00:00:10, Serial0

Route D
202.30.5.0/24 bị loại bỏ do giá trị metric của nó đã là 15.

Chỉ nên chọn D, hay D là đáp án cuối cùng và duy nhất của em.

[themask]

52. Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?

A. frame-relay arp
B. frame-relay map
C. frame-relay interface-dlci
D. frame-relay lmi-type
53. Exhibit:

Mình chọn câu B. Lệnh frame-relay interface-dlci chỉ được dùng vói Subinterface thoi; còn frame-relay map đều sủ dụng được vói physical interface và subinterface .


TM nghĩ la frame-relay map kô dùng được cho subinterface point-to-point

[mmx]

hi

câu 57:

57. Routercs# show ip route

Codes: C-connected, s-static, l -IGRP, R -RIP, M -mobile, B -BGP, D -EIGRP, EX - EIGRP external, O -OSPF, IA -OSPF inter area, EI -OSPF external type 1, E2 -OSPF external type 2, E -EGP, i -IS-IS, L1 -IS-IS level-1, L2 -IS-IS level-2, * -candidate default, U - per-user static route
Gateway of last resort is not set
R 202.30.8.0 /24[120/1] via 202.30.2.2, 00:00:10, Serial 0
C 202.30.9.0 /24 is directly connected, Serial 1
R 202.30.10.0 /24 [120/7] via 202.30.9.1, 00:00:02, Serial 1
R 202.30.11.0 /24 [120/7] via 202.30.9.1, 00:00:03, Serial 1
C 202.30.1.0 /24 is directly connected, Ethernet 0
C 202.30.2.0 /24 is directly connected, Serial 0
R 202.30.3.0 /24 [120/1] via 202.30.2.2, 00:00:10. Serial 0
R 202.30.4.0 /24 [120/15/ via 202.30.2.2, 00:00:10, Serial 0
R 202.30.5.0 /24 [120/15] via 202.30.2.2, 00:00:10, Serial 0
R 202.30.6.0 /24 [120/15] via 202.30.2.2, 00:00:10, Serial 0
R 202.30.7.0 /24 [120/1] via 202.30.2.2, 00:00:10, Serial 0

You examine the routing table of your router named Routercs. This routing table will be send to neighboring routers via broadcasts. Some routes might be discarded and not entered in to the routing tables of the neighboring RIP routers. Which of the following routes would be discarded in this way?

A. R 202.30.8.0/24 [120/1] via 202.30.2.2, 00:00:10, Serial0
B. R 202.30.11.0/24 [120/7] via 202.30.9.1, 00:00:03, Serial1
C. C 202.30.1.0/24 is directly connected, Ethernet0
D. R 202.30.5.0/24 [120/15] via 202.30.2.2, 00:00:10, Serial0

Route D
202.30.5.0/24 bị loại bỏ do giá trị metric của nó đã là 15.

Chỉ nên chọn D, hay D là đáp án cuối cùng và duy nhất của em.

Theo mình nghĩ, thì đáp án D chưa đủ, người ta hỏi là: Routes nào sẽ không được đưa vào bảng định tuyến của những router xung quanh. Nếu dùng phép OR thấy ngay rằng A,B,D là sẽ bị như vậy.
- A sẽ bị router nối với serial0 loại bỏ (split-horizon)
- B sẽ bị router nối với serial1 loại bỏ (split-horizon)
- D sẽ bị router nối với serial0 loại bỏ (split-horizon)

[themask]

52. Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?

A. frame-relay arp
B. frame-relay map
C. frame-relay interface-dlci
D. frame-relay lmi-type
53. Exhibit:

Mình chọn câu B. Lệnh frame-relay interface-dlci chỉ được dùng vói Subinterface thoi; còn frame-relay map đều sủ dụng được vói physical interface và subinterface .


TM nghĩ la frame-relay map kô dùng được cho subinterface point-to-point


interface Serial0/0.1 point-to-point
ip address 137.20.100.1 255.255.255.0
ip ospf priority 0
frame-relay de-group 1 201
frame-relay interface-dlci 201

########################

r2(config-subif)#frame-relay map ip 10.10.10.1 201
FRAME-RELAY INTERFACE-DLCI command should be used on point-to-point interfaces

########################

interface Serial0/0.1 point-to-point
ip address 137.20.100.1 255.255.255.0
ip ospf priority 0
frame-relay de-group 1 201
frame-relay interface-dlci 201

..no thing new...

[govap]

52. Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?

A. frame-relay arp
B. frame-relay map
C. frame-relay interface-dlci
D. frame-relay lmi-type
53. Exhibit:

Mình chọn câu B. Lệnh frame-relay interface-dlci chỉ được dùng vói Subinterface thoi; còn frame-relay map đều sủ dụng được vói physical interface và subinterface .


TM nghĩ la frame-relay map kô dùng được cho subinterface point-to-point

dear hai vị

Frame Relay dùng hai cơ chế cho phần định vị địa chỉ:

Cơ chế động: InverseARP được dùng. Khi này thì trên main-interfaces hay subinterfaces đều không cần làm gì cả. Các thiết bị đầu cuối tự nó biết nó có DLCI là bao nhiêu.

Cơ chế tĩnh: phải dùng lệnh frame-relay map để map tĩnh giá trị IP và DLCI do FR switch cung cấp. Khi dùng lệnh frame-relay map, InverseARP sẽ bị disable tự động.

[govap]

hi

câu 57:

57. Routercs# show ip route

Codes: C-connected, s-static, l -IGRP, R -RIP, M -mobile, B -BGP, D -EIGRP, EX - EIGRP external, O -OSPF, IA -OSPF inter area, EI -OSPF external type 1, E2 -OSPF external type 2, E -EGP, i -IS-IS, L1 -IS-IS level-1, L2 -IS-IS level-2, * -candidate default, U - per-user static route
Gateway of last resort is not set
R 202.30.8.0 /24[120/1] via 202.30.2.2, 00:00:10, Serial 0
C 202.30.9.0 /24 is directly connected, Serial 1
R 202.30.10.0 /24 [120/7] via 202.30.9.1, 00:00:02, Serial 1
R 202.30.11.0 /24 [120/7] via 202.30.9.1, 00:00:03, Serial 1
C 202.30.1.0 /24 is directly connected, Ethernet 0
C 202.30.2.0 /24 is directly connected, Serial 0
R 202.30.3.0 /24 [120/1] via 202.30.2.2, 00:00:10. Serial 0
R 202.30.4.0 /24 [120/15/ via 202.30.2.2, 00:00:10, Serial 0
R 202.30.5.0 /24 [120/15] via 202.30.2.2, 00:00:10, Serial 0
R 202.30.6.0 /24 [120/15] via 202.30.2.2, 00:00:10, Serial 0
R 202.30.7.0 /24 [120/1] via 202.30.2.2, 00:00:10, Serial 0

You examine the routing table of your router named Routercs. This routing table will be send to neighboring routers via broadcasts. Some routes might be discarded and not entered in to the routing tables of the neighboring RIP routers. Which of the following routes would be discarded in this way?

A. R 202.30.8.0/24 [120/1] via 202.30.2.2, 00:00:10, Serial0
B. R 202.30.11.0/24 [120/7] via 202.30.9.1, 00:00:03, Serial1
C. C 202.30.1.0/24 is directly connected, Ethernet0
D. R 202.30.5.0/24 [120/15] via 202.30.2.2, 00:00:10, Serial0

Route D
202.30.5.0/24 bị loại bỏ do giá trị metric của nó đã là 15.

Chỉ nên chọn D, hay D là đáp án cuối cùng và duy nhất của em.

Theo mình nghĩ, thì đáp án D chưa đủ, người ta hỏi là: Routes nào sẽ không được đưa vào bảng định tuyến của những router xung quanh. Nếu dùng phép OR thấy ngay rằng A,B,D là sẽ bị như vậy.
- A sẽ bị router nối với serial0 loại bỏ (split-horizon)
- B sẽ bị router nối với serial1 loại bỏ (split-horizon)
- D sẽ bị router nối với serial0 loại bỏ (split-horizon)

YES, IT DOES!!!
Chỉ D là đủ. Trong câu hỏi, không có một diagram nào chỉ ra sơ đồ kết nối. Anh có đưa ra lý do split-horizon, nhưng chỉ đúng nếu các routes đó xuất phát từ router láng giềng.

[calvin.nguyen]

Dear govap,

mình nghĩ là inverseARP không dùng đuọc vói Multipoint subinterface . Khong biết co đúng không ?

[children200482]

Câu 16 :

MTU 1500 bytes, Bw 10000 Kbit, Dly 1000 Usec.reliability 128/255, txload 1/255, rxload 1/255Encapsulation Arpa, loop back not seCKeepalive set (10 Sec)ARP type: Arpa, Arp Timeout 04:00:00Last Input 21:24:36, output 00:00:08, output hang never last clearing of "show interface" countees never Queuing strategy: FIFO Output queue 0/40, 0 drops; input queue 0/75: drops5 min input rate 0 bits/sec, 0 packets/sec 5 min output rate 0 bits/sec, packets/sec75427 packet input, 10685636 bytes, 0 buffer Received 75427 broadcast, 933 runts, 253 giants, 0 throttles0 input error, 0 cvc, 0 frame. 0 overrun, 0 ignored0 input packet with dribble condition detected78387 packet output, 7329230 bytes, 0 under nuns.

During routine network maintenance, a technician issues the show interface E0 command. A partial output of the command is shown in exhibit which values displayed in the command output could indicate that collisions have occurred (Choose two)

A. MTV 1500 bytes
B. Reliability 128/255
C. 933 runts
D. 75427 broadcasts
E. 78387 packets output
F. 253 giants

ANS : C and F

các anh thấy thế nào

[children200482]

42.
The network administrator of the Contoso1 router adds the following command to the router configuration:

ip route 192.168.12.0 255.255.255.0 172.16.12.1

What are the results of adding this command? (Choose two)

A. The command establishes a static route.
B. The command invokes a dynamic routing protocol for 192.168.12.0.
C. Traffic for network 192.168.12.0 is forwarded to 172.16.12.1.
D. Traffic for all networks is forwarded to 172.16.12.1.
E. This route is automatically propagated throughout the entire network.

ANS : A and C

[dangquangminh]

hi

theo mình thì bạn cần kiểm tra thông tin là "hiện tượng collision sẽ gây ra rất nhiều các frame lỗi -runts và giant". Nếu thông tin trên là đúng, chọn lựa của bạn là đúng.

Cám ơn

[dangquangminh]

hi calvin,

nếu là multipoint subinterfaces, phải dùng frame map để chỉ ra DLCI nào sẽ được dùng cho subinterface đó.

cám ơn

[dangquangminh]

hi

lệnh trên chính là định nghĩa một static route. Ý nghĩa của lệnh

ip route 192.168.12.0 255.255.255.0 172.16.12.1

là tất cả các traffic đến network 192.168.12.0 sẽ được chuyển đến máy có IP là 172.16.12.1

cám ơn,

[Jindo]

Các bạn xem bài nay xem có phải ******* sai hay mình sai nhé, ******* trả lời là default gate way nên là 1 broadcast address và đưa ra đáp số là 192.168.166.46 (trong khi broadcast address của thằng host này là 192.168.166.47 chu),mình thấy topology này chẳng có cái gì sai cả.Các bạn xem thử trong file đính kèm nhé.Mong được thảo luận để nâng cao kiến thức

[Hajime]

Mình coi đi coi lại cũng thấy topology này đúng rồi! Địa chỉ mạng cho segment này là : 192.168.166.32 /28 ->192.168.166.47 . Trong file cấu hình của host thấy các Ip, subnetmask và default gateway đều đúng .

IP address : 192.168.166.142
Subnet mask : 255.255.255.240 ( mượn 4 bit làm network thì là 240 : đúng rùi)
Default gateway : 192.168.166.33

Trong các chọn lựa của ******* , B,C,D chắc chắn sai. chỉ còn lại A, nhưng A thì khó hiểu quá.. default gateway sao lại là broadcast address ??? => ******* sai !!!

Có ai có thêm ý kiến gì không?

[ngolongit]

Chao moi nguoi,
Trong ******* v15.1, cau 11 mình thấy câu đúng phải là câu B mới phải. Xin mọi người cho biết ý kiến nhé.

QUESTION NO: 11
********A nối với ********B qua Frame Relay Switch.
Exhibit:
What function does the Frame Relay DLCI provide with respect to ********A?
A. Defines the signaling standard between ********A and the frame switch.
B. Identifies the circuit between ********A and the frame switch.
C. Identifies the circuit between ********B and the frame switch.
D. Identifies the encapsulation used between ********A and ********B.
E. Defines the signaling standard between ********B and the frame switch,
Answer: C
Explanation:
********A sends frames with DLCI, and they reach the local switch. The local switch sees the DLCI field and
forwards the frame through the Frame Relay network until it reaches the switch connected to ********B. The
********B’s local switch forwards the frame out of the access link to ********B.

[ninhhn]

Mình xem khá kỹ hình post lên và mình cũng cùng quan điểm với những ý kiến trên. ******* chắc nhầm gì đó.
http://www.vnpro.org/forum/download.php?id=657

[Jindo]

Mình cũng cùng ý kiến, có ai có ý kiến khác không? bài này trong ******* ver 22 câu 14 mình dowload từ www.Net130.com, còn 1 câu sai nữa là câu số 36 :
You are network technician at *******.You have told a newly appointed trainee that the OSI model has 7 layer and that Application layer is the highest layer.The trainee is curious as to which protocols operate at the application layer.
A-TCP
B-Telnet
C-FTP
D-SNMP
E-IP

Answer:B,C

Theo mình câu này phải có thêm D mới đúng vì SNMP cũng là 1 protocol operate tại application layer.

[Jindo]

mình nghĩ câu trả lời này của ******* là đúng rồi, bạn đọc kỹ lại câu hỏi xem.Thân

[ngolongit]

Đúng rùi, ******** bị sai. Mọi người xem bài này tương tự nhưng có đáp án khác nè.

[Jindo]

Bài mà bạn nói ở trong ******** ver 15, câu trả lời trong bài này là đúng vì default gateway là network address

[mmx]

Các bạn xem bài nay xem có phải ******* sai hay mình sai nhé, ******* trả lời là default gate way nên là 1 broadcast address và đưa ra đáp số là 192.168.166.46 (trong khi broadcast address của thằng host này là 192.168.166.47 chu),mình thấy topology này chẳng có cái gì sai cả.Các bạn xem thử trong file đính kèm nhé.Mong được thảo luận để nâng cao kiến thức

Jindo không sai, ******** sai.

[danguyennhi]

Trong topo trên, mọi thứ đều đúng một cách hoàn hảo.

Subnet mà host và gateway đang dùng là
192.168.166.32/28
Địa chỉ broadcast của subnet trên là 192.168.166.47.

Ý nghĩa tích cực của scenario này là giúp các bạn suy nghĩ về các địa chỉ phù hợp cho một subnet nào đó.

Chúc vui vẻ

[imported_g_dragon]

Mình có một số câu hỏi không sure lắm nên post hỏi mọi người nhờ giúp đỡ

QUESTION NO: 18
You are a network technician at ********. The ******** network is illustrated in the following exhibit.

Router(BRI)-------------------(ISDN Cloud)--------------------(BRI)Router

Study it carefully:
Note: SPIDs are not required for this switch.
Which of the following command will you use to bring up the ISDN link? (Select three options.)
A. Router(config-if)# encapsulation ppp
B. Router(config)# dialer-list 1 protocol ip allow
C. Router(config)# isdn switch-type type
D. Router(config)# dialer map ip address name connection number
E. Router(config-if)# dialer-group 1
F. Router(config-if)# ip address address subnet mask


QUESTION NO: 27

What are the characteristic of link state routing protocols? (Choose all that apply.)
A. The exchange of advertisement is triggered by a change in the network.
B. All routers exchange routing tables with each other iIn a multipoint network.
C. Packets are routed based upon the shortest path to the destination.
D. Paths are chosen depending on the cost efficiency factor.
E. Every router in an OSPF area is capable of representing the entire network topology.
F. Only the designated router in an OSPF area can represent the entire network topology.

QUESTION NO: 48
What is the function of access control lists (ACLs)? (Choose all that apply.)
A. Monitor the number of bytes and packets.
B. Assume role off virus detector.
C. Identify interesting traffic for DDR.
D. IP route filtering.
E. Provide high network availability.
F. Classify and organizing network traffic.

QUESTION NO: 61
You are a network technician at ********, Inc. The ******** network is shown in the following exhibit:
SPIDs are not required for this switch.
Which of the following configuration commands are the minimum commands required to bring up the
ISDN link? (Choose all that apply.)
A. Router(Config-if)# ip address subnet mask
B. Router(Config-if)# dialer-list, protocol ip permit
C. Router(Config-if)# isdn switch-type type
D. Router(Config-if)# dialer map ip address name name connection number.
E. Router(Config-if)# encapsulation ppp
F. Router(Config-if)# dialer group 1


QUESTION NO: 62
Which of the following features are PPP characteristics? (Choose all that apply.)

A. Encapsulates several different types of routing protocols.
B. Supports only IP.
C. Can be used over analog circuits.
D. Maps Layer addresses.
E. Corrects errors.

QUESTION NO: 86
Which of the statements mentioned below describes the OSPF routing protocol? (Choose all that apply.)
A. It confines network instability to a single area of network.
B. It increases the routing overhead of the network
C. It supports VLSM
D. It routes between Autonomous Systems.
E. It allows extensive control of routing update


QUESTION NO: 110
Which of the following commands will configure an interface on a Catalyst 2900 series switch to carry
traffic from all VLANs to another directly connected switch? (What would your response be?)
A. Switch(config-if)# vlan all
B. Switch(config-if)# switchport trunk encapsulation dot1q
C. Switch(config-if)# switchport access vlan all
D. Switch(config-if)# switchport mode trunk
E. Switch(config-if)# switchport access clan 30


Which of the following pieces of information is displayed by the show host command? (Select two
options.)
A. The IP addresses of workstations allowed gain access to the router.
B. Permanent name-to-address mappings created using the ip host command.
C. Temporary and permanent DNS entries.
D. The names of the routers created using the hostname command.
E. The length of time a host has been connected via Telnet.


QUESTION NO: 202
Study the Exhibit below carefully:
London#show vtp status
VTP Version: 2
Configuration Revision: 0
Maximum VLANs supported locally: 64
Number of existing VLANs: 5
VTP Operating Mode: Client
VTP Domain Name: London
VTP Pruning Mode: Disabled
VTP V2 Mode: Disabled
VTP Traps Generation: Disabled
Above is an illustration of the output of the London switch. What is the function of this switch?
A. Learn and saved VTP configuration in the running configuration.
B. Create and change VLANs.
C. Passes information about VTP configuration.
D. VTP is disabled on this device.
E. VTP is not saved to NVRAM.


QUESTION NO: 204
Study the Exhibit below carefully:
Central# show running-config Remote# show running-config
<some output text omitted>> <some output text omitted
interface Serial0/0 interface Serial0/0
ip address 10.0.8.1 255.255.248.0 ip address 10.0.15.2 255.255.248.0
encapsulation frame-relay encapsulation frame-relay
frame-relay map ip 10.0.15.2 200 frame-relay map ip 10.0.8.1 100
! !
router rip router rip
network 10.0.0.0 network 10.0.0.0
A remote site has just been connected to the central office. However, remote users can not access
applications at the central office. The remote router can be pinged from the central office router. After
reviewing the command output shown in the exhibit illustrated above, what is the most likely reason for
the problem?
A. The Frame Relay PVC is down.
B. The IP addressing on the Central/Remote serial link is incorrect.
C. RIP routing information is not being forwarded.
D. Frame Relay inverse-ARP is not properly configured.

QUESTION NO: 222
With regard to ISDN, which of the following are true? (Choose all that apply.)
A. Legacy DDR can use port information to define interesting traffic.
B. Legacy DDR can configure multiple dialer configurations on the same interface.
C. Legacy DDR can use ACLs to define interesting traffic.
D. HDLC or PPP can be used to encapsulate ISDN D channel information.
E. The BRI interfaces on ISDN routers with dialer profiles configured cannot belong to multiple dialer
pools.
F. Dialer profiles cannot use ACLs to define interesting traffic.


QUESTION NO: 226
With regard to ISDN, which of the following are true? (Choose all that apply.)
A. Each ISDN B channel has transmission speeds of up to 64 kbps.
B. The ISDN B channel can carry video, voice or data.
C. The ISDN B channel transmission rate varies depending on the service used.
D. The ISDN D channel transmits control information.
E. The ISDN B channels can be configured with different subnets and encapsulation types when dialer
profiles are configured.

QUESTION NO: 235
You are the network technician at ********. ******** has a router that is connected to a Frame Relay
WAN link using a serial DTE interface. Your newly appointed ******** trainee wants to know how the
interface clock rate is determined on this router.
What will your reply be?
A. It is determined by the CSU/DSU.
B. It is determined by the far end router.
C. It is specified in the clock rate command.
D. It is determined by the Layer 1 bit stream timing.

[admin]

Mình có một số câu hỏi không sure lắm nên post hỏi mọi người nhờ giúp đỡ

QUESTION NO: 18
You are a network technician at ********. The ******** network is illustrated in the following exhibit.

Router(BRI)-------------------(ISDN Cloud)--------------------(BRI)Router

Study it carefully:
Note: SPIDs are not required for this switch.
Which of the following command will you use to bring up the ISDN link? (Select three options.)
A. Router(config-if)# encapsulation ppp
B. Router(config)# dialer-list 1 protocol ip allow
C. Router(config)# isdn switch-type type
D. Router(config)# dialer map ip address name connection number
E. Router(config-if)# dialer-group 1
F. Router(config-if)# ip address address subnet mask


.

Trong cấu hình ISDN, cần chỉ ra loại tổng đài ISDN.
Dùng lệnh isdn switch-type type
Lệnh này dùng ở interface mode và global-config mode.

Trong interface mode, cần chỉ ra 'interesting traffic' mà interface sẽ kích hoạt khi có traffic đó. Apply bằng lệnh dialer-group 1

Sau cùng, bạn cần phải gán IP address cho các interfaces với lệnh
ip address address subnet-mask

Thân

[nhanh]

Hi,
Không biết bác dragon có đánh nhầm câu dialer-list 1 ip protocol allow không?, hay là nó đánh lừa mình( vì không có tham số allow, mà chỉ có tham số permit)
Nếu bác gõ đúng thì mình đồng ý với câu trả lời của Admin.

Còn nếu bác nhầm thì phải chọn câu B và bỏ câu F, vì lệnh dialer-group mà không có dialer-list thì làm việc thế nào được

[imported_g_dragon]

Mình thì gõ không nhầm rồi, tại vì là copy-paste mà, chỉ sợ là bên ******** nhầm thôi.
Theo mình thì với Ques 18 thì nếu câu hỏi đúng là như ******** thì mình chọn A,C,F vì nếu B sai thì E cũng sai theo, còn câu D lệnh dialer map thì đánh ở interface mode

[admin]

hi g_dragon

ISDN có thể họat động tốt với cả hai protocol là ppp và hdlc. Do đó, lệnh encapsulation ppp không phải là một điều kiện bắt buộc để kích họat đường ISDN.

cám ơn

[imported_g_dragon]

Mình đồng ý là encapsulation ppp là không bắt buộc nhưng nếu chỉ có dialer-group mà chưa khai báo dialer-list trước đó thì cũng chịu, hơn nữa nếu thật sự muốn cấ hình đầy đũ DDR thì còn cần map và route nữa.

[admin]

hi

Như vậy là g_dragon và admin đã thống nhất với nhau hai chọn lựa:

F/ Cần phải gán IP address
C/ Cần chỉ ra lọai tổng đài isdn switch-type

Sự khác bịệt nằm ở

nên chọn A 'encapsulation ppp
hay nên chọn E ' dialer-group 1'

Do đó, nên quay lại ngữ cảnh của câu hỏi:

"QUESTION NO: 18
You are a network technician at ********. The ******** network is illustrated in the following exhibit.

Router(BRI)-------------------(ISDN Cloud)--------------------(BRI)Router

Study it carefully:
Note: SPIDs are not required for this switch.
Which of the following command will you use to bring up the ISDN link? (Select three options.)
A. Router(config-if)# encapsulation ppp
B. Router(config)# dialer-list 1 protocol ip allow
C. Router(config)# isdn switch-type type
D. Router(config)# dialer map ip address name connection number
E. Router(config-if)# dialer-group 1
F. Router(config-if)# ip address address subnet mask "

Từ khóa cho việc chọn lựa là "to bring up the ISDN link?".

Và như g_dragon từng thực tập, lệnh dialer_group dùng để apply một interesting traffic vào interface dialer. Lệnh này mang tính chất sống còn để một interface dialer có thể BRING UP the ISDN link.

Trong khi đó, ISDN vẫn có thể chạy mà không cần 'encapsulation ppp'.

Cám ơn,

[imported_g_dragon]

Trước tiên phải nói là rất cám ơn admin đã quan tâm trả lời câu hỏi của mình. :D

QUESTION NO 61 cũng tương tự như question 18 nên nếu thống nhất được câu này thì cũng coi như ổn.

Nếu theo như cách của admin thì câu 61 cũng sẽ tương tự câu trả lời sẽ là
A,C,F

Mình không hề phản đối ý kiến của admin nhưng theo mình thấy thì cho dù là cách của admin hay cách của mình vẫn không đủ để "bring up the ISDN link"

Vì

Nếu không có dialer-group (chứ không phải dialer group như đề bài) thì sẽ bị báo lỗi tương tự như sau

Mar 1 00:07:22.255: Di1 DDR: ip (s=10.1.0.1, d=194.183.201.1),
100 bytes, outgoing uninteresting (no dialer-group defined).

Nếu có dialer-group nhưng vẫn chưa khai báo dialer-list trước đó thì

*Mar 1 00:08:24.919: Di1 DDR: ip (s=10.1.0.1, d=194.183.201.1),
100 bytes, outgoing uninteresting (dialer-list 1 not defined).

Nhưng nếu list và group đều có mà chưa dùng dialer map hay dialer string thì

Mar 1 00:37:24.235: Di1 DDR: ip (s=10.1.0.1, d=194.183.201.1),
100 bytes, outgoing interesting (ip PERMIT)
*Mar 1 00:37:24.239: Di1 DDR: Cannot place call, no dialer string set

Tóm lại mình nghĩ một số câu hỏi rất khó thống nhất ,có thể ******* hoặc cisco đã có sai sót trong đề


Mong admin xem giúp những câu hỏi khác
Cảm ơn

[dangquangminh]

QUESTION NO: 27

What are the characteristic of link state routing protocols? (Choose all that apply.)
A. The exchange of advertisement is triggered by a change in the network.
B. All routers exchange routing tables with each other iIn a multipoint network.
C. Packets are routed based upon the shortest path to the destination.
D. Paths are chosen depending on the cost efficiency factor.
E. Every router in an OSPF area is capable of representing the entire network topology.
F. Only the designated router in an OSPF area can represent the entire network topology.



Trong các routing protocols nhóm link-state, mỗi khi có một thay đổi trong network thì các thông tin về sự thay đổi này sẽ được cập nhật thông qua advertisements (các LSU trong OSPF). Hầu hết các linkstate routing protocol không trao đổi FULL routing tables.

Ngoài ra, các gói dữ liệu sẽ luôn được routers 'route' theo đường đi tốt nhất mà một routers có thể xác định.

Trong OSPF, tất cả các routers đều có trong một database. Database này là dạng thể hiện của toàn bộ topology mà routers đó tham gia vào.

Designated router trong OSPF chỉ đặc trưng cho một LAN segments mà nó làm đại diện. DR không đặc trưng cho toàn bộ network topology.

Cám ơn

[imported_g_dragon]

QUESTION NO: 27

What are the characteristic of link state routing protocols? (Choose all that apply.)
A. The exchange of advertisement is triggered by a change in the network.
B. All routers exchange routing tables with each other iIn a multipoint network.
C. Packets are routed based upon the shortest path to the destination.
D. Paths are chosen depending on the cost efficiency factor.
E. Every router in an OSPF area is capable of representing the entire network topology.
F. Only the designated router in an OSPF area can represent the entire network topology.

Cám ơn anh Minh đã trả lời. Vậy theo anh Minh có phải câu trả lời là A,C,E. Trong ******** cũng trả lời như vậy nhưng em còn thắc mắc nhỏ này. Em thấy câu D cũng là 1 possible answer vì theo em biết là ospf chọn đường đi dựa vào cost (=10^8/bandwidth). Trong khi câu C em thấy câu trả lời có vẻ không clear lắm, "shortest path " là như thế nào, nếu hiểu theo nghĩa đen là con đường ngắn nhất về cự ly. Vậy thì có lẽ không hợp lý

Cám Ơn

[ji80]

Xin chào

Em cũng nghĩ là Link-state protocol chọn đường đi theo Lowest Cost chứ không hẳn là Shortest-path

Cám ơn

[dangquangminh]

QUESTION NO: 27

What are the characteristic of link state routing protocols? (Choose all that apply.)
A. The exchange of advertisement is triggered by a change in the network.
B. All routers exchange routing tables with each other iIn a multipoint network.
C. Packets are routed based upon the shortest path to the destination.
D. Paths are chosen depending on the cost efficiency factor.
E. Every router in an OSPF area is capable of representing the entire network topology.
F. Only the designated router in an OSPF area can represent the entire network topology.

Cám ơn anh Minh đã trả lời. Vậy theo anh Minh có phải câu trả lời là A,C,E. Trong ******** cũng trả lời như vậy nhưng em còn thắc mắc nhỏ này. Em thấy câu D cũng là 1 possible answer vì theo em biết là ospf chọn đường đi dựa vào cost (=10^8/bandwidth). Trong khi câu C em thấy câu trả lời có vẻ không clear lắm, "shortest path " là như thế nào, nếu hiểu theo nghĩa đen là con đường ngắn nhất về cự ly. Vậy thì có lẽ không hợp lý

Cám Ơn

g_dragon:

Câu hỏi này hỏi về các thuộc tính chung nhất của LINKSTATE routing protocols. Câu hỏi không hỏi về OSPF.

Trong các linkstate routing protocols như OSPF, ISIS, EIGRP...các packets sẽ được route đi theo đường đi tốt nhất (shortest path). Tiêu chí để đánh giá một đường đi là tốt hay xấu sẽ dựa vào một đại lượng gọi là METRIC.

METRIC của OSPF là cost, metric của EIGRP là một tổ hợp của băng thông, delay, load...

Như vậy, dù với cách tính nào đi nữa, các routing protocol sẽ chọn ra được đường đi tốt nhất THEO CÁCH MÀ NÓ HIỂU, theo cách mà routing protocol đó đánh giá về thế giới xung quanh nó.

Cám ơn g_dragon và ji80

[imported_g_dragon]

QUESTION NO: 48
What is the function of access control lists (ACLs)? (Choose all that apply.)
A. Monitor the number of bytes and packets.
B. Assume role off virus detector.
C. Identify interesting traffic for DDR.
D. IP route filtering.
E. Provide high network availability.
F. Classify and organizing network traffic

Câu này mình chọn là C,D,F còn ******** chọn là C,D,E mình không chắc chắn lắm, nhờ mọi người chỉ giúp


QUESTION NO: 62
Which of the following features are PPP characteristics? (Choose all that apply.)

A. Encapsulates several different types of routing protocols.
B. Supports only IP.
C. Can be used over analog circuits.
D. Maps Layer addresses.
E. Corrects errors.

Câu này thì mình chỉ thấy có câu E là đúng thôi. Mình chỉ biết PPP encapsulate several different types of routed protocols và can be used over async circuit thôi

[danguyennhi]

Hi

PPP có thể chạy trên cả synchronous và asynchronous circuit. Do đó chọn C.
Trong LCP có NCP thực hiện quá trình map các layer 3 protocol sang thành layer 2 protocols. Do đó nên chọn thêm D.

[imported_g_dragon]

Cám ơn danguyennhi đã trả lời, nhưng theo câu hỏi là

Can be used over analog circuits chứ không phải là sync hay async
Ngoài ra vấn đề
LCP có NCP thực hiện quá trình map các layer 3 protocol sang thành layer 2 protocols danguyennhi có thể nói thêm về vấn đề này không, hình như mình chưa biết vấn đề này

[danguyennhi]

hi

PPP thường đuợc dùng như là một WAN protocol trong các phương thức truyền dữ liệu trên các đường dây điện thoại. Trong câu hỏi này, g_dragon nên giữ cho mọi việc đơn giản. Không cần thiết nhấn mạnh sự khác nhau giữa các khái niệm sync/async hay các analog circuit.

[chuoitay]

Tôi đang bị mắc về phần cách tính access-list. Bạn có tài liệu hướng dẫn về cách tính trên cho tôi xin?
Cám ơn

[kokichi81]

Bạn hãy nói cụ thể là bận thắc mắc cách tính access-llist ra sao?
Bạn hỏi chung chung như vậy mình không biết trả lời những cái gì đây.

[tranducquydt]

toi dang tim boson cisco test ( 640-801). Co ai biết noi cho toi cách download voi

[kokichi81]

Bạn vào boson.com down về.
Sau đó down chương trình winhex về.Rồi mình sẽ chỉ cách crack sau.
thân

[cacodemon]

261.QUESTION NO: 261
You are the network administrator at ********. Your ******** trainee is working in a lab that has a
Frame Relay network in which Inverse ARP is not operational. She wants to know which command
would provide connectivity in this network.
What will your reply be?

A. frame-relay arp
B. frame-relay map
C. frame-relay interface-dlci
D. frame-relay lmi-type

286.QUESTION NO: 286
The ******** network has a conferencing system that uses Voice over IP. The system uses UDP
datagrams to send the voice data between communicating hosts. Your newly appointed ******** trainee
wants to know what will happen if the datagrams out of sequence arrive at their destination when the
network becomes busy.
What will your reply be?

A. UDP will send an ICMP Information Request to the source host.
B. UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
C. UDP will drop the datagrams.
D. UDP will use the sequence numbers in the datagram headers to reassemble the data in the correct order.
E. UDP will not acknowledge the datagrams and wait for a retransmission of the datagrams.

294.QUESTION NO: 294
Your newly appointed ******** trainee wants to know which WAN encapsulations can be configured on
an asynchronous serial connection.
What will your reply be?

A. PPP and ATM
B. PPP and SDLC
C. ATM and HDLC
D. SDLC and HDLC

297.QUESTION NO: 297
You are the network administrator at ********. You are asked to provide an ISDN WAN link for the
******** network. A modular Cisco router with 2 serial connections and a BRI/U interface is the only
available router. You want to adapt this router for the ISDN connection.
What should you do?

A. Do nothing. The router is already suitable.
B. Purchase and install a BRI WAN interface in the router.
C. Purchase an external NT1 to terminate the local loop.
D. Purchase and install a TA/NT1 device on the router.

[nhanh]

261.Vì Inverse ARP không họat động, do đó FR không tự động map địa chỉ IP với DLCI, vì vậy phải có lệnh frame-relay map để cấu hình manual, vì vậy đáp án là câu B.

286. Vì UDP là giao thức lớp transport và unreliable, do đó nó sẽ không pass the information up to next OSI layer(Vì Transport layer đảm nhiệm chức năng truyền nhận rồi)nên câu B sai, nó không acknowledge nhưng cũng không chờ cho retransmission, do đó câu E sai. Vì nó không tin cậy, nên cũng không đảm bảo về thứ tự gói tin, do đó sẽ không dùng sequence number, vì vậy câu D sai. Nó cũng sẽ không gửi ICMP để thông báo lỗi, nên câu A sai. Bản chất của nó chỉ là "best effort".
Vậy đáp án là câu C.

294. Theo mình thì đáp án là câu A, vì PPP support cả synchronous/asynchronous. Còn ATM thì chạy trên asynchronous serial vì đó là bản chất của nó.

297. Đáp án ở đây là câu A, vì router có giao tiếp BRI/U nên có thể nối đến mạng ISDN của nhà cung cập

Câu C chỉ đúng khi router có giao tiếp BRI S/T.
Câu D chỉ đúng khi router không có giao tiêp ISDN.

Router(TE1)----(S/T)-----NT1---U----ISDN Network

TE2---R---TA---S/T---NT1----U----ISDN Network
(Cấu hình trên là ở North America,khi đó NT1 là của customer, còn ở Châu Âu thì từ giao tiếp S/T nối đến mạng của nhà cung cấp, nghĩa là NT1 thuộc mạng của nhà cung cấp)

[HXN]

52. Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?

A. frame-relay arp
B. frame-relay map
C. frame-relay interface-dlci
D. frame-relay lmi-type
53. Exhibit:
-----

Mình chọn câu B. Lệnh frame-relay interface-dlci chỉ được dùng vói Subinterface thoi; còn frame-relay map đều sủ dụng được vói physical interface và -

======

the ma téking no tra loi la C day

[VoThanhDuy]

nếu không có frame-relay inverse-arp, bạn phải dùng lệnh frame-relay map để chỉ ra IP address và dlci mà bạn dự định dùng. Đáp án đúng là B.

[EIGRP]

68. You are working as a network technician at Contoso. You are required to troubleshooting the WAN link between the Contoso main office at Boston and the Contoso remote office at Rio De Janeiro. A Cisco router that was providing Frame Relay connectivity at the Rio de Janeiro site as replaced with a different vendor's frame relay router. Connectivity is now down between the Boston and Rio De Janeiro site.
What is the most likely cause of the problem?
A. Mismatched LMI types.
B. Incorrect DLCI.
C. Mismatched encapsulation types.
D. Incorrect IP address mapping.

Neu chung ta quay lai de bai:
A Cisco router that was providing Frame Relay connectivity at the Rio de Janeiro site as replaced with a different vendor's frame relay router.
Trong truong hop...if one router is not a Cisco router you must use IETF encapsulation(ICND - Cisco Press).
Boi vay, de cho Connectivity is now UP between the Boston and Rio De Janeiro site chung ta can config tren both Routers:

int serial 0
encapsulation frame-relay IETF

boi vay cho nen toi chon C -> Mismatched encapsulation types

52. Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?
A. frame-relay arp
B. frame-relay map
C. frame-relay interface-dlci
D. frame-relay lmi-type

B -> frame-relay map

[cacodemon]

cam on cac bac ban
cho minh hoi tiep ?

295.QUESTION NO: 295
Your ******** trainee wants to know which VLANs are allowed over a new trunk link that is configured
on an IOS based switch.
What will your reply be?

A. All defined VLANs are allowed on the trunk by default.
B. Each VLAN, or VLAN range, that is specified with the switchport mode command.
C. Each VLAN, or VLAN range, that is specified with the vtp domain command.
D. Each VLAN, or VLAN range, that is specified with the vlan database command.

288.QUESTION NO: 288
You are the CEO at ********. The network administrator has left the company unexpectedly. ********
is experiencing problems with its Internet connection. You retrieve the following interconnection
diagram from the equipment room.
Based on the diagram, what type of Internet connection could ******** have? (Choose two)

A. DSL
B. Frame Relay
C. ISDN
D. Dedicated T1
E. Wireless
F. POTS

253.QUESTION NO: 253
You are the network administrator at ********. The RIP routing protocol is being used on the ********
network. RIP is configured with default settings and equal cost load balancing. The ******** network
has six paths with the same metric and administrative distance for a single destination.
Which of the six paths will RIP use to reach the destination?

A. Only the first two paths that are learned.
B. Four of the paths.
C. All six routes in a routed robin fashion.
D. The oldest two paths in the routing table.
E. The first path learned to the destination network.

[dangquangminh]

cam on cac bac ban
cho minh hoi tiep ?

295.QUESTION NO: 295
Your ******** trainee wants to know which VLANs are allowed over a new trunk link that is configured
on an IOS based switch.
What will your reply be?

A. All defined VLANs are allowed on the trunk by default.
B. Each VLAN, or VLAN range, that is specified with the switchport mode command.
C. Each VLAN, or VLAN range, that is specified with the vtp domain command.
D. Each VLAN, or VLAN range, that is specified with the vlan database command.

.

Mặc định, kết nối trunk sẽ mang tất cả các VLAN.

[Hajime]

288.QUESTION NO: 288
You are the CEO at ********. The network administrator has left the company unexpectedly. ********
is experiencing problems with its Internet connection. You retrieve the following interconnection
diagram from the equipment room.
Based on the diagram, what type of Internet connection could ******** have? (Choose two)

A. DSL
B. Frame Relay
C. ISDN
D. Dedicated T1
E. Wireless
F. POTS

Where is diagram???


253.QUESTION NO: 253
You are the network administrator at ********. The RIP routing protocol is being used on the ********
network. RIP is configured with default settings and equal cost load balancing. The ******** network
has six paths with the same metric and administrative distance for a single destination.
Which of the six paths will RIP use to reach the destination?

A. Only the first two paths that are learned.
B. Four of the paths.
C. All six routes in a routed robin fashion.
D. The oldest two paths in the routing table.
E. The first path learned to the destination network.

Chọn B vì RIP có khả năng hỗ trợ 6 paths cho equal cost load balancing, nhưng default chỉ sử dụng 4 paths thôi

[Hajime]

Anh Minh wrote


51. A Class C network address has been subnetted with a /27 mask. Which of the following addresses is a broadcast address for one of the resulting subnets?

A. 201.57.78.33
B. 201.57.78.64
C. 201.57.78.97
D. 201.57.78.97
E. 201.57.78.159
F. 201.57.78.254

Không chọn được đáp án nào cả. Ta có Class C 201.57.78.0 / 27 nên ta có mỗi subnet có 32 IP address và 8 subnets.
Subnet 0: 201.57.78.0
Subnet 1: 201.57.78.32
Subnet 2: 201.57.78.64
…..
Subnet 7: 201.57.78.224

Broadcast address của subnet 0 là: 201.57.78.31, do đó muốn biết các địa chỉ ở trên cái nào là broadcast address thỉ ta chỉ việc trừ đi 31 và chia cho 32, nếu chia hết thỉ nó là địa chỉ broadcast.. -- không có địa chỉ nào phù hợp, =>đề sai


52. Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?

A. frame-relay arp
B. frame-relay map
C. frame-relay interface-dlci
D. frame-relay lmi-type

Chọn câu B, frame-relay map ip vì Frame Relay sử dụng LMI và Inverse ARP để map IP và DLCI, nếu không có Inverse ARP thì phải dùng map tĩnh thôi.


53. Exhibit:

A network administrator in London has been instructed to prevent all traffic originating on the Paris LAN from entering the Contoso2 router. Which statement would accomplish this filtering?

A. access-list 101 deny ip 192.168.45.0 0.0.0.255 any
B. access-list 101 deny ip 192.168.45.0 0.0.0.0 any
C. access list 101 deny ip 192.168.46.0 0.0.0.0.255 198.168.45.0 0.0.0.255
D. access-list 101 deny ip 192.168.46.0 0.0.0.255 any

Chọn câu A, đây là extended access-list, any là đại diện cho tất cả các địa chỉ của Contoso2 router và access-list này được đặt ở Contoso2 router.


54. Identify three valid host addresses in the 192.168.27.0 network with a subnet mask of 255.255.255.240. (Choose three)
C. 192.168.27.33
D. 192.168.27.112
E. 192.168.27.119
F. 192.168.27.126
G. 192.168.27.175
H. 192.168.27.208

Chọn C, E, F… Các địa chỉ còn lại không là network number thì cũng là broadcast address của các subnet.


55. You are upgrading your Cisco router IOS from a TFTP server over the network. The upgrade procedure is stopped and you are prompted to erase the current flash contents before continuing. What is most plausible reason for this?
A. There is insufficient room for more than one image.
B. The router has detected a copy of the current software image on the TFTP server.
C. The file can be relocated and not compressed.
D. The image to load is a binary executable file

Chọn A, miễn bình luận gì thêm… một nước không thể có 2 vua…


56. At Layer 2 of the OSI model, which component connects a host to the network media?

A. Hub
B. Switch
C. Bridge
D. NIC
E. Transceiver

Chọn B và C, Switch và Bridge, vì chúng xử lý packet dựa vào MAC Address  Layer 2


57. Routercs# show ip route

Codes: C-connected, s-static, l -IGRP, R -RIP, M -mobile, B -BGP, D -EIGRP, EX - EIGRP external, O -OSPF, IA -OSPF inter area, EI -OSPF external type 1, E2 -OSPF external type 2, E -EGP, i -IS-IS, L1 -IS-IS level-1, L2 -IS-IS level-2, * -candidate default, U - per-user static route
Gateway of last resort is not set
R 202.30.8.0 /24[120/1] via 202.30.2.2, 00:00:10, Serial 0
C 202.30.9.0 /24 is directly connected, Serial 1
R 202.30.10.0 /24 [120/7] via 202.30.9.1, 00:00:02, Serial 1
R 202.30.11.0 /24 [120/7] via 202.30.9.1, 00:00:03, Serial 1
C 202.30.1.0 /24 is directly connected, Ethernet 0
C 202.30.2.0 /24 is directly connected, Serial 0
R 202.30.3.0 /24 [120/1] via 202.30.2.2, 00:00:10. Serial 0
R 202.30.4.0 /24 [120/15/ via 202.30.2.2, 00:00:10, Serial 0
R 202.30.5.0 /24 [120/15] via 202.30.2.2, 00:00:10, Serial 0
R 202.30.6.0 /24 [120/15] via 202.30.2.2, 00:00:10, Serial 0
R 202.30.7.0 /24 [120/1] via 202.30.2.2, 00:00:10, Serial 0

You examine the routing table of your router named Routercs. This routing table will be send to neighboring routers via broadcasts. Some routes might be discarded and not entered in to the routing tables of the neighboring RIP routers. Which of the following routes would be discarded in this way?

A. R 202.30.8.0/24 [120/1] via 202.30.2.2, 00:00:10, Serial0
B. R 202.30.11.0/24 [120/7] via 202.30.9.1, 00:00:03, Serial1
C. C 202.30.1.0/24 is directly connected, Ethernet0
D. R 202.30.5.0/24 [120/15] via 202.30.2.2, 00:00:10, Serial0

Chọn D
Theo mmx đã viết là do split-horizon (đồng ý ), nhưng nếu các R path trên không phải học từ một số neighbor router thì sao? Do đó, để giữ cho vấn đề đơn giản, có thể kết luận rằng:
Một số router sẽ bỏ các route A, B, một số thì không, nhưng chắc chắc là router nào cũng sẽ discard route D vì lúc này metric ( hop count đã là 15 rồi ).



59. You work as a network technician at Contoso. You have completed the password recovery procedure on a Cisco router. The process is successful and the router returns to normal operation. What is configuration register value at this point of time?

A. 0x2100
B. 0x2101
C. 0x2102
D. 0x2124
E. 0x2142

Chọn C, lúc này ta đánh lệnh như sau:
Router(config)# config-register 0x2102
Router(config)# reload

Khi này, Router sẽ reload lại và boot từ NVRAM.


60. Your Contoso trainee Boris is configuring a serial interface on a Cisco router. He asks you want encapsulations he can use on the interface.
What should you tell him? (Choose three)

A. Ethernet
B. Token Ring
C. HDLC
D. Frame Relay
E. PPP

Chọn C, D, E


61. You are configuring a network at Contoso main site in Toronto. You use a distance vector routing protocol. What could you use to prevent rooting loops in the network? (Choose two)
A. Link-state advertisements (LSA)
B. Spanning Tree Protocol
C. Shortest path first tree
D. Split horizon
E. Hold-down timers

Chọn D, E


62. Your Contoso trainee Jose are interested in ACL’s (access control lists). He asks you want they can be used for. What should you tell him? (Choose three)
A. Protect hosts from viruses.
B. Classify network traffic.
C. Provide high network availability.
D. Identify interesting traffic for DDR.
E. IP route filtering.
F. Monitor the number of bytes and packets

Chọn B, C, D vì đó là chức năng của access-list mà… :))


63. You work as a network consultant. You are planning a network installation for a large organization named Contoso. The design requires 100 separate subnet works, so Contoso has acquired a Class B network address. What subnet mask will provide the 100 subnet works required, if 500 usable host addresses are required per subnet?

A. 255.255.240.0
B. 255.255.246.0
C. 255.255.252.0
D. 255.255.254.0
E. 255.255.255.0
F. 255.255.255.192

Chọn D, khi đó ta có 128 subnets và mỗi subnet có khoảng 512 IP address…


64. You work as a network technician at Contoso. You are required to establish a Telnet session with a Cisco router. Which commands should you use?

A. Contoso1(config)# line console 0
B. Contoso1(config)# line console 0
C. Contoso1(config)# line console 0
D. Contoso1(config)# line vty 0
E. Contoso1(config)# line vty 0
F. Contoso1(config)# line vty 0

đề này kỳ quá …, vậy là chọn D, E, F rồi …

Mệt quá, nhảy câu thôi !!! :))


are working as a network technician at Contoso. You are required to troubleshooting the WAN link between the Contoso main office at Boston and the Contoso remote office at Rio De Janeiro. A Cisco router that was providing Frame Relay connectivity at the Rio de Janeiro site as replaced with a different vendor's frame relay router. Connectivity is now down between the Boston and Rio De Janeiro site.
What is the most likely cause of the problem?

A. Mismatched LMI types.
B. Incorrect DLCI.
C. Mismatched encapsulation types.
D. Incorrect IP address mapping.

Chọn A, vì thay đổi vendor thì có thể hoạt động khác LMI type với cái ban đầu, còn câu C thì chắc chắn không phải rồi vì encapsulation của nó là frame-relay mà..

Còn B thì cũng không đúng vì theo đề bài thì Boston và Rid De Janerio nối point-to-point với nhau, thì khi đó, mỗi router interface chỉ cần đánh các lệnh: ip address, encapsulation frame-relay và frame-relay lmi-type là nó sẽ tự động chạy rồi…

Còn D thì chuối quá ….


70. Exhibit: o/r 0x2142

You are working with a 2500 series Cisco router. You are performing the password recovery procedure. You have just typed the command shown in the exhibit. Your Contoso trainee Mahmoud is curious on the purpose of this command. What should you tell him? (choose all that apply)

A. To restart the router.
B. To bypass the configuration in NVRAM.
C. To view the lost password.
D. To save the changes to the configuration.
E. To enter ROM Monitor mode.

Chọn B


ur boss at Contoso want you to brief him on differences and similarities between bridges and switches. What should you tell her? (Choose two)

A. Bridges are faster than switches because they have fewer ports.
B. A switch is a multi port bridge,
C. Bridges and switches learn MAC addresses by examining the source MAC address of each frame received.
D. A bridge will forward a broadcast but a switch will not.
E. Bridges and switches increase the size of a collision domain.

Chọn B, C

Câu E là sai vì bridge và switch làm tăng số lượng collision domain, làm giảm size of collision domain.. Câu A cũng sai vì switch hoạt động nhanh hơn bridge vì switch xử lý packet dựa vào hardware còn hub dựa vào software, v.v


72. Your Contoso trainee Bob wants some information regarding the split horizon rule. What should you tell him?

A. Only routers can split boundaries (horizons) between concentric networks.
B. All distance vector protocols require fall back routes that may cause momentary loops as the topology changes.
C. Networks can only remain fully converged if all information about routes is sent out all active interfaces.
D. Information about a route should not be sent back in the direction from which the original update came.
E. Each AS must keep routing tables converged to prevent dead routes from being advertised across the AS boundary.

Chọn D.


73. Your Contoso trainee Ellen is studying the basic of distance vector and link state routing protocols. As her mentor, what could you tell her? (Choose two)

A. Distance vector protocols send the entire routing table to directly connected neighbors.
B. Link state protocols send the entire routing table to all routers in the network.
C. Distance vector protocols send updates about directory connected neighbors to all networks listed in the routing table.
D. Link state protocols send updates containing the state of their own links to all other routers on the network.

Chọn A, D
Link-state protocol chứa toàn bộ database về network, và triggered update, và gửi các update hay routing protocol cho các neighbor router của nó ( như OSPF, EIGRP)…

Distance vector protocl gửi toàn bộ bảng routing table của nó cho các router nối trực tiếp với nó.


74. You have segmented a network into two separate segments, segment 1 and segment2, with a Cisco router. Your boss at Contoso is concerned about the cost, and wants to what the purpose of your action is.

What should you tell him?

A. It increases the number of collisions.
B. It decreases the number of broadcast domains.
C. It connects segment 1's broadcasts to segment 2.
D. It prevents segment 1's broadcasts from getting to segment 2.

Chọn D. Dùng router thì làm tăng số lượng collision domain và broadcast domain, nhưng size của chúng lại giảm xuống… Mục đích chính của việc sử dụng Router đó chính là làm giảm size của broadcast domain nhằm ngăn cản storm broadcast nên chọn câu D là chính xác nhất.


75. Roger is setting up WAN connectivity between the Contoso New York and the Contoso Tokyo offices. He uses a uses two data link layer encapsulations, one for data and one for signaling. Which WAN Service does he use?

A. ISDN
B. Frame Relay
C. ATM
D. FDDI

Chọn A. ISDN sử dụng encapsulation HDLC hay PPP cho kênh B, LABD cho kênh D.

[EIGRP]

Which of the following factors determines the OSPF router ID when configuring a router with both
physical and logical interfaces?
A. The lowest network number of any interface.
B. The highest network number of any interface.
C. The highest IP address of any logical interface.
D. The middle IP address of any logical interface.
E. The lowest IP address of any physical interface.
F. The highest IP address of any physical interface.
G. The lowest IP address of any logical interface.

theo minh nghi cau tra loi C la dung nhat:
C. The highest IP address of any logical interface.

moi moi nguoi cho biet ý kien

[Hajime]

Chọn B: "the highest network number of any interface"

OSPF sẽ chọn ra IP address của bất kỳ interface nào của các router nằm trong mạng broadcast để bầu ra Router ID... Để cho mạng luôn ổn định thì người ta thường sử dụng loop back interface...

Thân chào,

[EIGRP]

Chọn B: "the highest network number of any interface"

OSPF sẽ chọn ra IP address của bất kỳ interface nào của các router nằm trong mạng broadcast để bầu ra Router ID... Để cho mạng luôn ổn định thì người ta thường sử dụng loop back interface...

Thân chào,

Minh xin trích dan tu sach ICND-Cíco Press:

To identify the routers in the neighbor table’s topology database, OSPF uses a router ID (RID) for each router. A router’s OSPF RID is that router’s highest IP address on a physical interface when OSPF starts running. Alternatively, if a loopback interface has been configured, OSPF uses the highest IP address on a loopback interface for the RID, even if that IP address is lower than some physical interface’s IP address.

loopback interface la mot logical interface, nhu vay trong truong hop nay thi cau tra loi C la dúng chứ.
anh Minh có ý kien nao khong a?

[EIGRP]

cam on cac bac ban
cho minh hoi tiep ?

295.QUESTION NO: 295
Your ******** trainee wants to know which VLANs are allowed over a new trunk link that is configured
on an IOS based switch.
What will your reply be?

A. All defined VLANs are allowed on the trunk by default.
B. Each VLAN, or VLAN range, that is specified with the switchport mode command.
C. Each VLAN, or VLAN range, that is specified with the vtp domain command.
D. Each VLAN, or VLAN range, that is specified with the vlan database command.

253.QUESTION NO: 253
You are the network administrator at ********. The RIP routing protocol is being used on the ********
network. RIP is configured with default settings and equal cost load balancing. The ******** network
has six paths with the same metric and administrative distance for a single destination.
Which of the six paths will RIP use to reach the destination?

A. Only the first two paths that are learned.
B. Four of the paths.
C. All six routes in a routed robin fashion.
D. The oldest two paths in the routing table.
E. The first path learned to the destination network.

295.A
253.B(By default, Cisco IOS software includes up to four equal-cost routes to the same subnet in the routing table—essentially as if maximum-paths 4 had been configured.)

[cacodemon]

cho mình hỏi vài câu?

170.QUESTION NO: 170
Which of the following commands should you use if you were asked to apply an access list on a virtual
terminal line of a router?

A. RouterTK(config-line)# access-class 10 in
B. RouterTK(config-if)# ip access-class 23 out
C. RouterTK(config-line)# access-list 150 in
D. RouterTK(config-if)# ip access-list 128 out
E. RouterTK(config-line)# access-group 15 out
F. RouterTK(config-if)# ip access-group 110in

159.QUESTION NO: 159
Which of the following pieces of information is displayed by the show host command? (Select two
options.)

A. The IP addresses of workstations allowed gain access to the router.
B. Permanent name-to-address mappings created using the ip host command.
C. Temporary and permanent DNS entries.
D. The names of the routers created using the hostname command.
E. The length of time a host has been connected via Telnet.

157.QUESTION NO: 157
What are the basic network services that is provided by the Cisco IOS? (Select three options.)

A. Defines topology
B. Access to network resources
C. Routing and switching functions
D. Creation of VLANs
E. Quality of service

[EIGRP]

cho mình hỏi vài câu?

170.QUESTION NO: 170
Which of the following commands should you use if you were asked to apply an access list on a virtual
terminal line of a router?

A. RouterTK(config-line)# access-class 10 in
B. RouterTK(config-if)# ip access-class 23 out
C. RouterTK(config-line)# access-list 150 in
D. RouterTK(config-if)# ip access-list 128 out
E. RouterTK(config-line)# access-group 15 out
F. RouterTK(config-if)# ip access-group 110in

159.QUESTION NO: 159
Which of the following pieces of information is displayed by the show host command? (Select two
options.)

A. The IP addresses of workstations allowed gain access to the router.
B. Permanent name-to-address mappings created using the ip host command.
C. Temporary and permanent DNS entries.
D. The names of the routers created using the hostname command.
E. The length of time a host has been connected via Telnet.

157.QUESTION NO: 157
What are the basic network services that is provided by the Cisco IOS? (Select three options.)

A. Defines topology
B. Access to network resources
C. Routing and switching functions
D. Creation of VLANs
E. Quality of service

170. a
159. b,c
157. a,b,c

[cacodemon]

115.QUESTION NO: 115
OSPF routing makes use of areas. What are the characteristics of these areas? (Choose all that apply.)

A. Hierarchical OSPF networks do not need multiple areas
B. Multiple OSPF areas must connect to area 0
C. Single area OSPF networks must be configured in area 1
D. Areas can be assigned any number from 0 to 63535
E. Area 0 is called the backbone area
F. Each OSPF area need to be configured with a loopback interface

câu này mình chọn B,D,E
đúng không vậy, xin các bạn chi giáo

[VoThanhDuy]

Trong ospf, tất cả các area phải nối về area 0. Area number có thể từ 0 cho đến 65535. Area 0 được gọi là backbone area

[EIGRP]

115.QUESTION NO: 115
OSPF routing makes use of areas. What are the characteristics of these areas? (Choose all that apply.)

A. Hierarchical OSPF networks do not need multiple areas
B. Multiple OSPF areas must connect to area 0
C. Single area OSPF networks must be configured in area 1
D. Areas can be assigned any number from 0 to 63535
E. Area 0 is called the backbone area
F. Each OSPF area need to be configured with a loopback interface

câu này mình chọn B,D,E
đúng không vậy, xin các bạn chi giáo

B,D,E nhưng from 0 to 65535 chứ không phải 63535.
khi đi thi mình có câu này đấy

[EIGRP]

-
RouterA------------------------------------- RouterB--------------------------------------RouterC
(114.125.16.0/24, 116.226.46.0/24)----------------- (123.92.76.0/24,136.125.85.0/24)

6 What actions will occur after RouterA loses connectivity to network 114.125.16.0? (Choose two.)
A.RouterB will include network 123.92.76.0 and 136.125.85.0 in its update to RouterA.
B.During the next update interval, RouterB will send a RIP update out both ports that includes the inaccessible network.
C.During the next update interval, RouterC will send an update to RouterB stating that network 114.125.16.0 is accessible in 2 hops.
D.Router C will learn of the loss of connectivity to network 114.125.16.0 from RouterB.
E.RouterB will include network 123.92.76.0 and 136.125.85.0 in its update to RouterC.

Các bạn ơi ? :?:

câu trả lời của mình: A, D

B - không đúng vì khi mà A mất connectivy với 114.125.16.0, thì phải cho đến next update A mới báo cho B biết được rằng là 114.125.16.0 inaccessible network, như vậy phai AFTER next update thi B mới biết được là 114.125.16.0 inaccessible network
C - cũng không đúng vi lúc này C vẫn chưa biết đươc là 114.125.16.0 inaccessible network
E - Split horizont

[cacodemon]

157.QUESTION NO: 157
What are the basic network services that is provided by the Cisco IOS? (Select three options.)

A. Defines topology
B. Access to network resources
C. Routing and switching functions
D. Creation of VLANs
E. Quality of service

Answer: A, B, C

159.QUESTION NO: 159
Which of the following pieces of information is displayed by the show host command? (Select two
options.)

A. The IP addresses of workstations allowed gain access to the router.
B. Permanent name-to-address mappings created using the ip host command.
C. Temporary and permanent DNS entries.
D. The names of the routers created using the hostname command.
E. The length of time a host has been connected via Telnet.

Answer: B, D

2 câu này đúng ko vậy?

[EIGRP]

159.QUESTION NO: 159
Which of the following pieces of information is displayed by the show host command? (Select two
options.)

A. The IP addresses of workstations allowed gain access to the router.
B. Permanent name-to-address mappings created using the ip host command.
C. Temporary and permanent DNS entries.
D. The names of the routers created using the hostname command.
E. The length of time a host has been connected via Telnet.


B,C

[huynhquocphong]

QUESTION NO: 226
With regard to ISDN, which of the following are true? (Choose all that apply.)

A. Each ISDN B channel has transmission speeds of up to 64 kbps.
B. The ISDN B channel can carry video, voice or data.
C. The ISDN B channel transmission rate varies depending on the service used.
D. The ISDN D channel transmits control information.
E. The ISDN B channels can be configured with different subnets and encapsulation types when dialer
profiles are configured.

Answer: A B D

Theo mình thì chọn như vậy. Các bác xem có đúng không?

[huynhquocphong]

Chào mọi người!

Tại sao chúng ta không post các câu hỏi trong ******** vào mục này? Các câu hỏi trong mục do anh Minh đưa ra thì chúng ta nên thảo luận trong mục ấy thôi để tiện theo dõi.

Anh Minh có thể post thêm các phần còn lại về các câu hỏi ôn thi CCNA không để mọi người có thêm đề tài thảo luận.

Thân chào.

[VoThanhDuy]

tốc độ của mỗi kênh B trong ISDN có thể là 56/64Kbps
Kênh B được dùng để mang dữ liệu voice, video, data...
Trong khi đó kênh D chỉ được dùng cho các tín hiệu điều khiển.

[cvo15303]

huynhquocphong mến!

Mình nghĩ nên sử dụng ******* như là một công cụ để chúng ta review những gì đã học, những gì đã hiểu và những gì chưa hiểu. ******* thật ra không hoàn toànđúng, nên đề nghị của bạn rất hợp lý.

Tuy nhiên, như bạn thấy đấy, hiện nay hầu như mọi vấn đề gút mắt trog chương trình ICND-CCNA đều đã đựoc đem ra mổ xẻ trên diễn đàn hết rồi. Chắc là mọi người cũng đã giải quyết được hết các câu hỏi rồi đó.

Mình tin chắc là diễn đàn luôn háo hức chờ đợi để tranh luận thêm với bạn về các vấn đề trong ******* đó.

Chúc vui

[cacodemon]

hi VoThanhDuy
u học bên Hoa Sen phải không?
nếu phải cho gửi lời hỏi thăm bạn TÂM nhe !
hehehe

[cacodemon]

QUESTION NO: 202
Study the Exhibit below carefully:
London#show vtp status
VTP Version: 2
Configuration Revision: 0
Maximum VLANs supported locally: 64
Number of existing VLANs: 5
VTP Operating Mode: Client
VTP Domain Name: London
VTP Pruning Mode: Disabled
VTP V2 Mode: Disabled
VTP Traps Generation: Disabled
Above is an illustration of the output of the London switch. What is the function of this switch?

A. Learn and saved VTP configuration in the running configuration.
B. Create and change VLANs.
C. Passes information about VTP configuration.
D. VTP is disabled on this device.
E. VTP is not saved to NVRAM.

câu này mình thấy C đúng mà E cũng không sai, help me?!

[huynhquocphong]

Vâng, như cvo nói nên xem ******** làm tài liệu để chúng ta thảo luận, mình cũng rất thích diễn đàn này. Quả thật, mình cũng chỉ mới tham gia thôi nên nhiều điều cần hỏi lắm.
Trong các thread mà anh Minh đưa ra hay thread nào đó cũng pha trộn một số câu hỏi trong ********, nói chung là còn rải rác nhưng chẳng sao, miễn theo dõi là OK thôi!

[danguyennhi]

bạn nên chọn C vì switch này đang họat động ở client mode, chỉ truyền các thông tin VTP

[ntemt]

QUESTION NO: 202
Study the Exhibit below carefully:
London#show vtp status
VTP Version: 2
Configuration Revision: 0
Maximum VLANs supported locally: 64
Number of existing VLANs: 5
VTP Operating Mode: Client
VTP Domain Name: London
VTP Pruning Mode: Disabled
VTP V2 Mode: Disabled
VTP Traps Generation: Disabled
Above is an illustration of the output of the London switch. What is the function of this switch?

A. Learn and saved VTP configuration in the running configuration.
B. Create and change VLANs.
C. Passes information about VTP configuration.
D. VTP is disabled on this device.
E. VTP is not saved to NVRAM.

câu này mình thấy C đúng mà E cũng không sai, help me?!

[ntemt]

QUESTION NO: 202
Study the Exhibit below carefully:
London#show vtp status
VTP Version: 2
Configuration Revision: 0
Maximum VLANs supported locally: 64
Number of existing VLANs: 5
VTP Operating Mode: Client
VTP Domain Name: London
VTP Pruning Mode: Disabled
VTP V2 Mode: Disabled
VTP Traps Generation: Disabled
Above is an illustration of the output of the London switch. What is the function of this switch?

A. Learn and saved VTP configuration in the running configuration.
B. Create and change VLANs.
C. Passes information about VTP configuration.
D. VTP is disabled on this device.
E. VTP is not saved to NVRAM.

câu này mình thấy C đúng mà E cũng không sai, help me?!


Các switch hoạt động ở VTP transparent mode không updates những thay đổi về VTP configuration do VTP server gửi tói nhưng nó vẫn pass các thông tin này đến các Switch khác. Do đó theo minh E mới là đáp án đúng.

[ntemt]

Which of the following factors determines the OSPF router ID when configuring a router with both
physical and logical interfaces?
A. The lowest network number of any interface.
B. The highest network number of any interface.
C. The highest IP address of any logical interface.
D. The middle IP address of any logical interface.
E. The lowest IP address of any physical interface.
F. The highest IP address of any physical interface.
G. The lowest IP address of any logical interface.

theo minh nghi cau tra loi C la dung nhat:
C. The highest IP address of any logical interface.

moi moi nguoi cho biet ý kien

Theo mình là F là câu trả lời đúng.

Vì ở đây đầu bài không nói rõ logical interface cụ thể là gì.Nếu nói rõ là interface loopback thì C là câu trả lời đúng.Nhưng logical interface có rất nhiều loại.Subinterface (như e0.1 ,s0.1) cũng là logical interface vay. Mà router sẽ không dựa vào interface này để chọn OSPF router ID.

Mong nhận được ý kiến đóng góp của các bạn.

[VoThanhDuy]

Which of the following factors determines the OSPF router ID when configuring a router with both
physical and logical interfaces?
A. The lowest network number of any interface.
B. The highest network number of any interface.
C. The highest IP address of any logical interface.
D. The middle IP address of any logical interface.
E. The lowest IP address of any physical interface.
F. The highest IP address of any physical interface.
G. The lowest IP address of any logical interface.

theo minh nghi cau tra loi C la dung nhat:
C. The highest IP address of any logical interface.

moi moi nguoi cho biet ý kien

Theo mình là F là câu trả lời đúng.

Vì ở đây đầu bài không nói rõ logical interface cụ thể là gì.Nếu nói rõ là interface loopback thì C là câu trả lời đúng.Nhưng logical interface có rất nhiều loại.Subinterface (như e0.1 ,s0.1) cũng là logical interface vay. Mà router sẽ không dựa vào interface này để chọn OSPF router ID.

Mong nhận được ý kiến đóng góp của các bạn.

Sách ICND nói rằng:

Địa chỉ IP address của cổng vật lý cao nhất sẽ được chọn. NẾU có một interface loopbac thì interface loopback mới được dùng. Do đó, nên chọn physical interface trước.

[ntemt]

[quote=dangquangminh]
3. Which of the following are characteristics of microsegmentation? (Choose two)

A. Dedicated paths between sending and receiving host are established
B. the number of collision domains is decreased
C. Broadcast domain are enlarged
D. Multiple subnetwork broadcast addresses are created
E. Multiple ARP tables are required on the connected hosts
F. Bandwidth is dedicated to connect hosts


.

quote]

Hi,

Khi chia một mạng thành nhiều segment, số lượng collision domain sẽ tăng. Đáp án B bị loại bỏ. Mỗi segment là một broadcast domain nên khi đó sẽ có nhiều broadcast domain được tạo ra. Phương án D được chọn. Mỗi broacast domain sẽ có kích thước nhỏ hơn trước nên phương án C bị loại bỏ. Bảng ARP trên từng host không phụ thuộc vào việc chia segment. Mỗi host chỉ có thể có 1 bảng ARP. Do đó phương án E bị loại bỏ. Phương án A được chọn do phương án F bị loại. Băng thông dành cho các host ko phụ thuộc vào phân segment.

Dù sao vẫn có thể có ý kiến khác. Mời mọi người tiếp tục trao đổi.

anh Minh ! Em nghĩ khi chia một mạng thành nhiều segment ,thì số lượng collision domains tăng lên,nhưng broadcast domain có tăng lên hay không thì phụ thuộc vào thiết bị mình sử dụng.Bridge/switch cũng segment 1 mạng nhưng nó lại ở trong 1 broadcast domain ,router thì chia mạng ra thành nhiều broadcast domains.Lúc này multiple subnetwork broadcast addresses are created. Microsegmentation là để sử dụng băng thông hiệu quả hơn.Do đó C không phải là câu trả lời đúng (nó chỉ đúng trong trường hợp dùng router ).Em nghĩ A ,F là câu trả lời đúng.

Em sắp thi CCNA nên rất mong nhận được ý kiến đóng góp của mọi người.Cảm ơn.

[ntemt]

Sorry ,nhầm một chỗ mất rồi.D không phải là câu trả lời đúng.Còn C rõ ràng là ko đúng rồi ,khỏi bàn cãi.

[lesydung]

XIN CHO EM HỎI overhead NGHĨA LÀ GÌ VẬY ANH MINH?

[dangquangminh]

http://forum.vnpro.org/viewtopic.php?t=2078

[emThuy]

Có câu hỏi đây:non-IT
Tại sao ******** lại sai nhiều thế...? Hay là để vnpro đem ra thảo luận.

[gaucaonguyen]

Đây là những câu mình cảm thầy không chắc chắn.Mong các bạn giúp đỡ!

[changchancuucodon]

đây là nội dung các câu hỏi:

Đây là những câu mình cảm thầy không chắc chắn.Mong các bạn giúp đỡ!

QUESTION NO: 20
Place the parameters in the correct sequence to configure dial-on-demand routing (DDR) on an ISDN
BRI interface.

QUESTION NO: 25
You are a network technician at ********. Due to rapid expansion, ******** is leaning towards scalable WAN technology. Immediate plans for the company include an additional 7 regional offices with all sites requiring continuous connectivity, but the current head office has no free ports available.
Which of the following WAN technologies will meet the requirements?
A. Frame Relay
B. Broadband cable
C. ISDN-BRI
D. ADSL
E. Dedicated PPP/HDLC links
F. ISDN



QUESTION NO: 162
Study the Exhibit below carefully:
Test_King#show ip protocol
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 4 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Redistribution rip
Default version control: send version 1, receive any version
Interface Send Recv Triggered RIP Key-chain
Serial0/0 1 1 2
Serial0/1 1 1 2 Đọan này khó hiểu quá???
Automatic network summarization is in effect
Maximum path: 4
Routing for Networks:
10.0.0.0
Routing Information Sources:
Gateway Distance Last Update
10.168.11.14 120 00:00:22
Distance: (default is 120)
John#show ip interfaces brief
Interface IP-Address OK? Method Status
FastEthernet0/0 192.168.18.1 YES manual up
Serial0/0 10.168.11.17 YES manual up
FastEthernet0/1 unassigned YES NVRAM administratively down
Serial0/1 192.168.11.21 YES manual up
The exhibit above shows the output from the router. Use it to determine which of the following are
correct. (Select two options.)
A. Router John will get routing updates on the Serial0/1 interface.
B. Router John will issue routing updates out the Serial0/0 interface.
C. Router John makes use of a link-state routing protocol.
D. Router John will get routing updates on the Serial0/0 interface.
E. Router John will issue routing updates out the FastEthernet0/0 interface.


QUESTION NO: 102
You are a network technician at ********, Inc. You have been assigned a junior trainee named Ellen.
She wants you to describe what is specific for a global command.
What would your response be?
A. A command that is available in every release of IOS, regardless of the version or deployment status.
B. A command that is set once and will result in affecting the rest of the router operationability.
C. A command that is implemented in all IOS versions.
D. A command that is universal in application supporting different types of protocols.
E. A command that can be entered in any configuration mode.


QUESTION NO: 163
One of the features of the OSPF routing protocol is that it maintains a topology database of information
about other routers in the network.
Which of the following is a characteristic of this topology database?
A. All entries in the topology database will be included on each router.
B. All routers in the same OSPF area will have one topology database.
C. The Dijkstra algorithm is used in the creation of the topology database.
D. LSA packets are used to update and maintain the topology database.


QUESTION NO: 168
Study the Exhibit below carefully:
RouterA# show running-config
<some output text omitted>
interface serial0/0
bandwidth 64
ip address 172.16.100.2 255.255.0.0
encapsulation frame-relay
frame-relay map ip 172.16.100.1 200 broadcast

The Hong Kong office with Router ********1, has a communication problem with the Tokyo branch
office which has Router ********2. The scenario is the following:
Router ********1 is unable to reach Router ********2. Both routers are running IOS version 12.0.
After reviewing the command output and graphic, your boss wants to know what is the most probable
cause of the problem. What should you tell him?
A. Bandwidth configuration incorrect
B. IP address not correct
C. Improper map statement
D. Improper LMI configuration



QUESTION NO: 188
Which of the following fields of frame is used by detection schemes to perform its function?
A. ERR
B. Flag
C. FCS
D. MTU
E. MAC
F. PDU

[changchancuucodon]

đây là nội dung các câu hỏi:


QUESTION NO: 25
You are a network technician at ********. Due to rapid expansion, ******** is leaning towards scalable WAN technology. Immediate plans for the company include an additional 7 regional offices with all sites requiring continuous connectivity, but the current head office has no free ports available.
Which of the following WAN technologies will meet the requirements?
A. Frame Relay
B. Broadband cable
C. ISDN-BRI
D. ADSL
E. Dedicated PPP/HDLC links
F. ISDN



Bạn nên chọn Frame relay vì:

số lượng chi nhánh là nhiều
không có port sẵn (phải dùng sub interface)
yêu cầu là CONTINUOUS connections

[sinhvienngheo]

QUESTION NO: 162
Study the Exhibit below carefully:
Test_King#show ip protocol
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 4 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Redistribution rip
Default version control: send version 1, receive any version
Interface Send Recv Triggered RIP Key-chain
Serial0/0 1 1 2
Serial0/1 1 1 2 Đọan này khó hiểu quá???
Automatic network summarization is in effect
Maximum path: 4
Routing for Networks:
10.0.0.0
Routing Information Sources:
Gateway Distance Last Update
10.168.11.14 120 00:00:22
Distance: (default is 120)
John#show ip interfaces brief
Interface IP-Address OK? Method Status
FastEthernet0/0 192.168.18.1 YES manual up
Serial0/0 10.168.11.17 YES manual up
FastEthernet0/1 unassigned YES NVRAM administratively down
Serial0/1 192.168.11.21 YES manual up
The exhibit above shows the output from the router. Use it to determine which of the following are
correct. (Select two options.)
A. Router John will get routing updates on the Serial0/1 interface.
B. Router John will issue routing updates out the Serial0/0 interface.
C. Router John makes use of a link-state routing protocol.
D. Router John will get routing updates on the Serial0/0 interface.
E. Router John will issue routing updates out the FastEthernet0/0 interface.




Router John sẽ nhận và gửi routing update trên cổng s0/0. Anh cần nên xem xét kỹ các giá trị của lệnh sh ip interface brief (chỉ có network 10 là có chạy RIP)

[flag]

Hi Gấu Cao Nguyên!

Lâu rồi không em nhi? đã nhận bằng ở sg*** rồn nhé! Khi nào em sẽ thi CCNA đây!

câu 162:
-Interface Send Recv Triggered RIP Key-chain : cái này Rip dùng để xác thực với nhau để gửi bảng routing thôi. Anh nào có cùng key là friend rồi.
-Automatic network summarization is in effect: vì là dùng Rip ver1 nên auto sum rồi: 10.0.0.0

Ở router Tétking:
Gateway Distance Last Update
10.168.11.14 120 00:00:22
Distance: (default is 120)

ở router John:
FastEthernet0/0 192.168.18.1 YES manual up
Serial0/0 10.168.11.17 YES manual up
FastEthernet0/1 unassigned YES NVRAM administratively down
Serial0/1 192.168.11.21 YES manual up

Như thế theo em thì câu nào là thích hợp nhất!
=============
câu 25:
em hãy key word của câu này :
-7 regional offices with all sites requiring continuous connectivity : những công nghệ nào đáp ứng nhu cầu này?
-current head office has no free ports available?

vậy em hãy chọn câu thích hơp.
Những câu còn lại thì em cứ đưa ra vấn đề mà em thắc mắc nhé !

Chúc vui, hôm nào họp mặt nhé.

[robedan]

QUESTION NO: 188
Which of the following fields of frame is used by detection schemes to perform its function?
A. ERR
B. Flag
C. FCS
D. MTU
E. MAC
F. PDU

TRẢ LỜI:

trong các thành phần của một frame ở layer 2, ta nhận thấy đều có field FCS để nhằm mục đích phát hiện lỗi của các frame này. Nguyên lý phát hiện lỗi được dựa trên việc dành ra các bit kiểm tra parity.

Đối với Ethernet frame, ta chỉ có thể phát hiện ra lỗi chứ không có khả năng khôi phục lỗi (không có khả năng error recovery)

Chào thân ái,

[gaucaonguyen]

Cảm ơn mọi người!
Hẹn gặp mặt anh em chứ anh flag,mọi người đều đang ôn tập chuẩn bị thi.
Ai cũng nhắc tới anh đó.

[lesydung]

Em trả lời như vậy có đúng kg anh Minh.
1/
A, D, E
2/
C
3/
A, D
4/
D
5/
A, B, C
6/
?
7/
A
8/
E
9/
E
10/
D
11/
B
12/
A, C, D
13/
D
14/
A, E, F
15/
B
16/
D, E
17/
A
18/
B, D
19/
A
20/
A, D
21/
A, B, C
22/
D
23/
D
24/
B, F
25/
C

[changchancuucodon]

1.Which statement describes the routing protocol OSPF (choose 3)

A.It supports VLSM
B.It is used to between Autonomous systems
C.It confines network instability to one area of network
D.It increases routing overhead over the network
E.It allows extensive control of the routing update
F.it is simpler to configure than RIPv2

ospf hỗ trợ cho VLSM. OSPF giới hạn sự bất ổn bên trong một area. OSPF cho phép kiểm sóat các routing update nhiều hơn. Chọn A, C E

[duyna]

QUESTION NO: 202
Study the Exhibit below carefully:
London#show vtp status
VTP Version: 2
Configuration Revision: 0
Maximum VLANs supported locally: 64
Number of existing VLANs: 5
VTP Operating Mode: Client
VTP Domain Name: London
VTP Pruning Mode: Disabled
VTP V2 Mode: Disabled
VTP Traps Generation: Disabled
Above is an illustration of the output of the London switch. What is the function of this switch?

A. Learn and saved VTP configuration in the running configuration.
B. Create and change VLANs.
C. Passes information about VTP configuration.
D. VTP is disabled on this device.
E. VTP is not saved to NVRAM.

câu này mình thấy C đúng mà E cũng không sai, help me?!
Câu này thực sự làm mình bối rối, theo câu A thì mình thấy cũng đúng vì switch hoạt động ở mode client nên nó có thể learn và saved vtp config vào running-config (chứ không phải NVRAM), câu C là đặc tính của transparent switch mà

[gaucaonguyen]

QUESTION NO: 148
One of your trainees wants to know at what stage are packets processed by an inbound access list. What
can you tell her?
A. Before they are routed to an outbound interface.
B. After they are routed for outbound traffic.
C. After they are routed to an outbound interface while queuing.
D. Before and after they are routed to an outbound interface.
QUESTION NO: 152
One of your trainees asked you which parameter must be supplied when initializing the IGRP routing
process. What is your response?
A. Connected subnet numbers
B. Register administrative subnet masks
C. IP address mask
D. Autonomous system number
E. Metric weights
QUESTION NO: 157
What are the basic network services that is provided by the Cisco IOS? (Select three options.)
A. Defines topology
B. Access to network resources
C. Routing and switching functions
D. Creation of VLANs
E. Quality of service
QUESTION NO: 202
Study the Exhibit below carefully:
London#show vtp status
VTP Version: 2
Configuration Revision: 0
Maximum VLANs supported locally: 64
Number of existing VLANs: 5
VTP Operating Mode: Client
VTP Domain Name: London
VTP Pruning Mode: Disabled
VTP V2 Mode: Disabled
VTP Traps Generation: Disabled
Above is an illustration of the output of the London switch. What is the function of this switch?
A. Learn and saved VTP configuration in the running configuration.
B. Create and change VLANs.
C. Passes information about VTP configuration.
D. VTP is disabled on this device.
E. VTP is not saved to NVRAM.
QUESTION NO: 204
Study the Exhibit below carefully:
Central# show running-config Remote# show running-config
<some output text omitted>> <some output text omitted
interface Serial0/0 interface Serial0/0
ip address 10.0.8.1 255.255.248.0 ip address 10.0.15.2 255.255.248.0
encapsulation frame-relay encapsulation frame-relay
frame-relay map ip 10.0.15.2 200 frame-relay map ip 10.0.8.1 100
! !
router rip router rip
network 10.0.0.0 network 10.0.0.0
A remote site has just been connected to the central office. However, remote users can not access
applications at the central office. The remote router can be pinged from the central office router. After
reviewing the command output shown in the exhibit illustrated above, what is the most likely reason for
the problem?
A. The Frame Relay PVC is down.
B. The IP addressing on the Central/Remote serial link is incorrect.
C. RIP routing information is not being forwarded.
D. Frame Relay inverse-ARP is not properly configured.

[robedan]

QUESTION NO: 148
One of your trainees wants to know at what stage are packets processed by an inbound access list. What can you tell her?
A. Before they are routed to an outbound interface.
B. After they are routed for outbound traffic.
C. After they are routed to an outbound interface while queuing.
D. Before and after they are routed to an outbound interface.


Câu hỏi này liên quan đến thứ tự xử lý các gói tin khi một router có áp đặt các accesslist. Khi router có một inbound accesslist, gói tin sẽ được xử lý bởi access list trước khi gói đó được router chuyển ra outbound interface.

Vậy trong câu hỏi này, chọn A 'Before they are routed to an outbound interface.'

[duyna]

QUESTION NO: 148
QUESTION NO: 152
One of your trainees asked you which parameter must be supplied when initializing the IGRP routing
process. What is your response?
A. Connected subnet numbers
B. Register administrative subnet masks
C. IP address mask
D. Autonomous system number
E. Metric weights


Có vậy mà cũng hỏi ku, đại ca nè. Cú pháp câu lệnh để dùng IGRP routing protocol là:
Router(config)#router IGRP autonomous_system_number
=> câu D

[duyna]

QUESTION NO: 148
QUESTION NO: 157
What are the basic network services that is provided by the Cisco IOS? (Select three options.)
A. Defines topology
B. Access to network resources
C. Routing and switching functions
D. Creation of VLANs
E. Quality of service

A, B, C


QUESTION NO: 202
Study the Exhibit below carefully:
London#show vtp status
VTP Version: 2
Configuration Revision: 0
Maximum VLANs supported locally: 64
Number of existing VLANs: 5
VTP Operating Mode: Client
VTP Domain Name: London
VTP Pruning Mode: Disabled
VTP V2 Mode: Disabled
VTP Traps Generation: Disabled
Above is an illustration of the output of the London switch. What is the function of this switch?
A. Learn and saved VTP configuration in the running configuration.
B. Create and change VLANs.
C. Passes information about VTP configuration.
D. VTP is disabled on this device.
E. VTP is not saved to NVRAM.

Câu này theo anh thì A (switch hoạt động ở mode client nên có thể learn và saved VTP config vào running-config(not NVRAM)) , không biết ý kiến mọi người ra sao?


QUESTION NO: 204
Study the Exhibit below carefully:
Central# show running-config Remote# show running-config
<some output text omitted>> <some output text omitted
interface Serial0/0 interface Serial0/0
ip address 10.0.8.1 255.255.248.0 ip address 10.0.15.2 255.255.248.0
encapsulation frame-relay encapsulation frame-relay
frame-relay map ip 10.0.15.2 200 frame-relay map ip 10.0.8.1 100
! !
router rip router rip
network 10.0.0.0 network 10.0.0.0
A remote site has just been connected to the central office. However, remote users can not access
applications at the central office. The remote router can be pinged from the central office router. After
reviewing the command output shown in the exhibit illustrated above, what is the most likely reason for
the problem?
A. The Frame Relay PVC is down.
B. The IP addressing on the Central/Remote serial link is incorrect.
C. RIP routing information is not being forwarded.
D. Frame Relay inverse-ARP is not properly configured.
=>C vì RIP quảng bá routing infor bằng địa chỉ broadcast nhưng trong câu lệnh map không cho broadcast đi qua nên routing infor không forward đươc. Ai có ý kiến khác xin góp ý nhẹ

[farontek]

QUESTION NO: 157
What are the basic network services that is provided by the Cisco IOS? (Select three options.)
A. Defines topology
B. Access to network resources
C. Routing and switching functions
D. Creation of VLANs
E. Quality of service

Câu này mình nghĩ là C, D và E thì đúng hơn. Phải không mấy huynh trưởng?


QUESTION NO: 202
Study the Exhibit below carefully:
London#show vtp status
VTP Version: 2
Configuration Revision: 0
Maximum VLANs supported locally: 64
Number of existing VLANs: 5
VTP Operating Mode: Client
VTP Domain Name: London
VTP Pruning Mode: Disabled
VTP V2 Mode: Disabled
VTP Traps Generation: Disabled
Above is an illustration of the output of the London switch. What is the function of this switch?
A. Learn and saved VTP configuration in the running configuration.
B. Create and change VLANs.
C. Passes information about VTP configuration.
D. VTP is disabled on this device.
E. VTP is not saved to NVRAM.

Còn câu này thì có lẻ do English của mình hơi bị bèo cho nên không hiểu phải chọn A hay là C hay là E, bởi thấy cái nào cũng đúng theo định nghĩa VTP client hết. Mong được các huynh trưởng bàn luận thêm.

Mình cũng có một câu này:
QUESTION NO: 57
To upgrade a network, emphasis must be placed on efficiency and error-free transport rather than fast transport. For this purpose, new switches had been purchased. Which switching mode should be configured on these new switches to have the desired effect?
A. 802.1q forwarding
B. VTP transparent mode
C. cut-through
D. store-and-forward
E. fragment-free
F. frame-filtering
Mình thì cho là Fragment-Free. Bởi cái này theo mình hiểu được thì nó kết hợp cả ưu điểm error-free của store and forward và ưu điểm của nhanh của cut-through --> efficiency. Còn bạn mình thì cho rằng là store and forward. Vậy còn các huynh trưởng thì sao?

[gaucaonguyen]

Cảm ơn sự giúp đỡ của mọi người.
Chúc mừng anh Duy đã đậu CCNA!
Em chỉ muốn chắc ăn trước khi ra trận thôi!
Mọi người còn lại sẽ tiếp bước đại ca!
Chúc thành công!

[duyna]

[quote]
QUESTION NO: 57
To upgrade a network, emphasis must be placed on efficiency and error-free transport rather than fast transport. For this purpose, new switches had been purchased. Which switching mode should be configured on these new switches to have the desired effect?
A. 802.1q forwarding
B. VTP transparent mode
C. cut-through
D. store-and-forward
E. fragment-free
F. frame-filtering
Mình thì cho là Fragment-Free. Bởi cái này theo mình hiểu được thì nó kết hợp cả ưu điểm error-free của store and forward và ưu điểm của nhanh của cut-through --> efficiency. Còn bạn mình thì cho rằng là store and forward. Vậy còn các huynh trưởng thì sao?

câu này chọn store-and-forward là đúng nhất vì mode store&forward nhận toàn bộ frame và kiểm tra lỗi của frame bằng field FCS nên khi forward frame bị lỗi sẽ không forward, fragment-free chỉ kiểm tra tính là frame này không bị lỗi do collision mà thôi (nhận vào 64 byte mới bắt đầu forward)

[nuocbap]

Trong số 75 câu ôn tập mà anh Minh đưa ra, có mấy câu mình trả lời mà không biết đúng hay sai. Mong các bạn/ các anh chị giúp mình.

12.Which characteristics are representative of a link-state routing protocol? (Choose three)

A. Provide common view of entire topology
B. Exchange routing tables with neighbors.
C. Calculates shortest path.
D. Utilizes event triggered updates.
E. Utilizes frequent periodic updates

Answers: CDE

13.Which of the following contribute to congestion on an Ethernet network. (Choose two)

A. Use of full duplex mode.
B. Creation of new collision domain.
C. Creation of new broadcast domain.
D. Addition of hub to the network.
E. Use of switches in the network.
F. Amount of ARP or IPX SAP traffic

Answers: BD

15.The command frame - relay map ip 10.121.16.8.102 broadcast was entered on the router. Which of the following statement is true concerning this command?

A. This command should be executed from the global configuration mode.
B. The IP address 10.121.16.8 is the local router part used to forward data
C. 102 is the remote DLCI that will receive the information.
D. Command is required for all frame relay configuration.
E. The broadcast option allows packet, such as RIP update, to be forwarded across the PVC.

Answers: A

16.
MTU 1500 bytes, Bw 10000 Kbit, Dly 1000 Usec.reliability 128/255, txload 1/255, rxload 1/255Encapsulation Arpa, loop back not seCKeepalive set (10 Sec)ARP type: Arpa, Arp Timeout 04:00:00Last Input 21:24:36, output 00:00:08, output hang never last clearing of "show interface" countees never Queuing strategy: FIFO Output queue 0/40, 0 drops; input queue 0/75: drops5 min input rate 0 bits/sec, 0 packets/sec 5 min output rate 0 bits/sec, packets/sec75427 packet input, 10685636 bytes, 0 buffer Received 75427 broadcast, 933 runts, 253 giants, 0 throttles0 input error, 0 cvc, 0 frame. 0 overrun, 0 ignored0 input packet with dribble condition detected78387 packet output, 7329230 bytes, 0 under nuns.

During routine network maintenance, a technician issues the show interface E0 command. A partial output of the command is shown in exhibit which values displayed in the command output could indicate that collisions have occurred (Choose two)

A. MTV 1500 bytes
B. Reliability 128/255
C. 933 runts
D. 75427 broadcasts
E. 78387 packets output
F. 253 giants

Answers: CF

41.An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location? (Choose two)

A. The switch must be configured with an IP address, subnet mask, and default gateway.
B. The switch must be connected to a router over a VLAN trunk.
C. The switch must be reachable through a port connected to its management VLAN.
D. The switch console port must be connected to the Ethernet LAN.
E. The switch management VLAN must be created and have a membership of at least one switch port.
F. The switch must be fully configured as an SMTP agent

Answers: AD

55.You are upgrading your Cisco router IOS from a TFTP server over the network. The upgrade procedure is stopped and you are prompted to erase the current flash contents before continuing. What is most plausible reason for this?

A. There is insufficient room for more than one image.
B. The router has detected a copy of the current software image on the TFTP server.
C. The file can be relocated and not compressed.
D. The image to load is a binary executable file

Answers: A

Cám ơn nhiều.

[rosekiller]

Hi all,
Tôi nhận thấy phần công nghệ WAN rất hay, khó và rất thực tế (và cả đang học tới nữa! ) nên mạnh dạn đưa ra topic này với í tưởng sưu tập các kiểu câu hỏi liên quan đến chỉ WAN thôi. Vì trình chưa cao nên rất mong sự góp sức của các bậc đàn anh trong việc đưa ra cả câu hỏi lẫn phương án trả lời.

Để mở hàng tôi xin trích vài câu hỏi về WAN, hi vọng sự góp ý của các bạn :

1. Study the Exhibit below carefully:

******* A ------- FR --------******* B

What is the function of the Frame Relay DLCI with regard to ********A?
A. Defines the signaling standard between ********A and ********B,
B. Identifies the type of encapsulation in operation between ********A and ********B.
C. Identifies the circuit between ********B and the frame switch.??
D. Defines the signaling standard between ********A and the frame switch.

2. You are a network technician at ********. The ******** network is illustrated in the following exhibit.
******* A ----( BRI0) ---- FR ------(BRI0)-- ******* B

Which of the following command will you use to bring up the ISDN link? (Select three options.)
Ạ Router(config)# encapsulation ppp??
B. Router(config)# dialer-list 1 protocol ip allow
C. Router(config)# isdn switch-type type (tôi chọn câu này!)
D. Router(config)# dialer map ip address name connection number
F. Router(config-if)# ip address address subnet mask


3. You are a network technician at ********. ******** has its head office in Mubai and a branch office in Delhi. You want to establish connectivity between head office and the branch office. You intend using two
data link layer encapsulation, one for data and one for signaling.
What type of WAN service allows two data layer encapsulations of this nature?
A. ISDN
B. ATM
C. FDDI
D. ATX
E. Frame RelayD. Cisco
E. Q933a

4. You are a network technician at ********. ******** has its head office in Berlin and a branch office in Bonn. You are troubleshooting the WAN link between head office and the branch office. You replace a Cisco router that was providing Frame Relay connectivity at the Bonn site with a frame
relay router from a different vendor. However, connectivity broke down between the two offices.

What is the most likely cause of the problem?
A. Mismatched LMI types.
B. Incompatible encapsulation types.
C. Mismatching IP addresses.
D. Incorrect DLCI.

5. Which of the following features are PPP characteristics? (Choose all that apply.)
A. Encapsulates several different types of routing protocols.
B. Supports only IP.
C. Can be used over analog circuits.??
D. Maps Layer addresses.
E. Corrects errors.

6. Which of the following options can be negotiated using LCP during the PPP link establishment? (Select three options.)
A. Q.931
B. IPCP
C. multilink
D. CHAP
E. callback

7.
You are a network technician at ********, Inc. You have been asked to set up Frame Relay for point-to-point subinterfaces.

Which of the following should not be configured?
A. The local DLCI on each subinterface of the Frame Relay.
B. The Frame Relay encapsulation on the physical interface. (I choice it!)
C. An IP address on the physical interface.
D. The subinterface only.

8. QUESTION NO: 128
Which of the following WAN protocols is used for out-of-band signaling?
A. HDLC
B. NCP
C. PAP
D. LAPD
E. LAPB

9. You want to form a WAN connection between two routers, one is a Cisco router and the other from another manufacturer, that are directly connected via a serial link. Which of the following commands
can you use?
A. Lab(config-if)# encapsulation hdlc ansi
B. Lab(config-if)# encapsulation ppp
C. Lab(config-if)# encapsulation isdn
D. Lab(config-if)# encapsulation frame-relay default

10. You need to establish a telnet session to verify the status of a physical connection. You then issue the debug frame-relay lmi command. However, after 40 seconds, you do not get any output resulting from
the debug command.

Why are no messages displayed?
A. The IP addresses are configured incorrectly.
B. Frame Relay LMI messages not displayed in real time.
C. The administrator must issue the enable frame-relay lmi debug command.
D. The administrator must issue the terminal monitor command.
E. Debug messages can only be received once through the console port.
F. The administrator must issue the show frame-relay lmi vty 0 4 command-

11. When you execute Router# show frame-relay, which of the following command options will be displayed?
(Select three options.)
A. dlci (tôi chọn)
B. clients
C. pvc
D. neighbors
E. lmi
F. map??

12. Select two of the following statements that are characteristics of a Frame Relay point-to-point subinterface.
A. Needs to use Inverse ARP.
B. Maps a single IP subnet per DLCI.
C. Maps a single IP subnet across multiple DLCIs.
D. Addresses and resolves NBMA split horizon issues.
E. Needs the frame-relay map command.

13. Which of the following WAN technologies provides small offices and private homes using normal telephone lines with higher speed digital dial-up service?
A. X25
B. Frame Relay
C. ATM
D. ISDN
E. ATX

14. How would you configure a router in a Frame Relay network to prevent issues such as split horizons hampering routing updates?

A. Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the subinterface.
B. Configure many sub-interfaces on the same subnet.
C. Configure each Frame Relay circuit as a point-to-point line.
D. Configure only one sub-interface to establish multiple PVC connections.
E. Configure a single sub-interface connect to multiple remote router interfaces.

15. How would you configure a router to avoid situations such as split horizon issues hampering routing updates on a Frame Relay network?
A. Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the subinterface. (same as Q14)
B. Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic.
C. Configure one sub-interface to disperse into multiple PVC connections to multiple remote router
interfaces.
D. Configure as many as possible sub-interfaces on the same subnet.

16. With regard to ISDN, which of the following are true? (Choose all that apply.)
A. Legacy DDR can use port information to define interesting traffic.
B. Legacy DDR can configure multiple dialer configurations on the same interface.
C. Legacy DDR can use ACLs to define interesting traffic.
D. HDLC or PPP can be used to encapsulate ISDN D channel information.
E. The BRI interfaces on ISDN routers with dialer profiles configured cannot belong to multiple dialer pools.
F. Dialer profiles cannot use ACLs to define interesting traffic.

thầy tôi chọn A, E!! sai hay đúng?

17. With regard to ISDN, which of the following are true? (Choose all that apply.)
A. Each ISDN B channel has transmission speeds of up to 64 kbps.
B. The ISDN B channel can carry video, voice or data.
C. The ISDN B channel transmission rate varies depending on the service used.
D. The ISDN D channel transmits control information.
E. The ISDN B channels can be configured with different subnets and encapsulation types when dialer profiles are configured.

18. You are a technician at ********. Your newly appointed ******** trainee wants to know what the purpose of Inverse ARP is.
What will your reply be?

A. It is used to map a known IP address to a MAC address
B. It is used to map a known DLCI to a MAC address
C. It is used to map a known MAC address to an IP address
D. It is used to map a known DLCI to an IP address
E. It is used to map a known MAC address to DLCI
F. It is used to map a known DLCI to a MAC address

19. You are the network administrator at ********. ******** has its headquarters in New York, and regional offices in Boston, Buffalo, Cleveland, Pittsburgh and Baltimore. You want to connect the
regional offices to headquarters. You are evaluating WAN technologies that could accomplish this. You want each regional office to be connected to the corporate headquarters in a hub and spoke arrangement
using a packet-switched technology.

Which of the following WAN technologies should you use?
A. ISDN
B. Wireless
C. Frame Relay
D. T1 leased line
E. Point to point leased line

20. You are the network administrator at ********. Your ******** trainee is working in a lab that has a Frame Relay network in which Inverse ARP is not operational. She wants to know which command would provide connectivity in this network.

What will your reply be?
A. frame-relay arp
B. frame-relay map
C. frame-relay interface-dlci
D. frame-relay lmi-type

Thầy tôi chọn là D???!!

21. You are the network administrator at ********. The ******** network encapsulates an ISDN link with PPP instead of HDLC. You newly appointed ******** trainee wants to know what advantages this represents.

What will your reply be? (Choose two.)
A. PPP is easier to configure and maintain than HDLC.
B. PPP is consistently implemented among different equipment vendors.
C. PPP will run faster and more efficiently than HDLC on circuit-switched ISDN links.
D. PPP authentication will prevent unauthorized callers from establishing an ISDN circuit.
E. PPP can be routed across public facilities, while HDLC is not routable in circuit-switched networks.

22. Your newly appointed ******** trainee wants to know which WAN encapsulations can be configured on an asynchronous serial connection.
What will your reply be?
A. PPP and ATM
B. PPP and SDLC
C. ATM and HDLC
D. SDLC and HDLC

23. You are a network administrator at ********.com. You are required to Cisco router for a Frame-Relay connection to a non-cisco router.

Which of the following commands should you use?
A. TestKRouter(config-if)# Encapsulation frame-relay q933a
B. TestKRouter(config-if)# Encapsulation frame-relay ansi
C. TestKRouter(config-if)# Encapsulation frame-relay ietf
D. TestKRouter(config-if)# Encapsulation frame-relay isl

24. By looking at the following configuration, which additional command must be issued on the Branch router before interesting traffic will be sent to the Remote router?
Hostname: Branch Hostname: Remote
PH# 123-6000, 123-6001 PH# 123-8000, 123-8001
SPID1: 32055512360001 SPID1: 32055512380001
SPID2: 32055512360002 SPID2: 32055512380002
isdn switch-type basic ni
username Remote password cisco
interface bri0
ip address 10.1.1.1 255.255.255.0
encapsulation ppp
ppp authentication chap
isdn spid1 32055512360001
isdn spid2 32055512360002
dialer map ip 10.1.1.2 name Remote 1238001
dialer-list 1 protocol ip permit

A. (config-if)# dialer-group 1
B. (config-if)# dialer-list 1
C. (config-if)# dialer map 1
D. (config-if)# dialer-route 1

25. Which of the following statements is true in regards to Frame Relay Multipoint subinterfaces?
A. An ip address is required on the physical interface
B. All routers are required to be fully meshed (tôi chọn B!)
C. All routers must be in the same subnet to forward routing updates and broadcasts
D. Multipoint is the default configuration for Frame Relay subinterfaces

Phù, trên đây là các câu hỏi và phương án trả lời (Đáp án của ******* tôi đánh dấu đậm!) cùng thắc mắc của tôi !! Nhờ anh em giải đáp giúp cho nhé. Ai có câu hỏi nào hay hơn, liên quan đến WAN, xin hãy post lên!

Cảm ơn,

have fun...

[imported_g_dragon]

2. Câu này mình không dám nói là sai nhưng theo mình biết thì nếu cấu hình ISDN mà không có switch type là không ổn
3.A
4.B
5. Theo mình thấy thì hình như trong kỳ thi CCNA thật sự không có câu nào theo kiểu Choose all that apply. Nhưng PPP thì có những nội dung mình không biết có gần giống với đáp án không
Encapsulate several different types of routed protocols
Can be used on synchronous and asynchronous circuit
Detect errors
Assign IP adrress(Giống như xài dial up vậy đó) và còn nhiều nữa
6 C,D,E
7 C
8 D
9 C
10 D
PHÙ MỆT, TRONG ******* ĐÃ CÓ HẾT ĐÁP ÁN RỒI MÀ

[rosekiller]

1st thank g_dragon!

Biết là trong ******* đã có đáp án rồi nhưng vẫn đưa lên để có thể biết câu nào sai mà còn sửa!

Ví dụ câu 1,2 đã có khá nhiều đáp án khác nhau! Như ******* thì đáp án khác những gì tôi và cậu nghĩ đấy!

[thewall]

Đệ có mấy câu hỏi mong được các anh chị giải đáp giùm!

1. Which of the following will allow a router to respond to an ARP request that is meant for a remote host?

A . Gateway DP
B. Reverse ARP
C. Proxy ARP
D. Inverse ARP
E. Indirect ARP2. You are a trainee technician at *******. Your instructor show you the following ouput:

hostname *******1 hostname *******2
! !
username *******2 password king username *******1 password king
! !
interface serial 0 interface serial 0
ip address 172.23.56.2 255.255.255.0 ip address 172.23.56.3 255.255.255.0
encapsulation ppp encapsulation ppp
clockrate 56000 ppp authenication chap

She tells ou that the output was taken from two directly connected routers. Your instructor wants to know which of the following lines will be displayed when you issue the Router# show interface serial 0 command
What will your reply be ? (choose all that apply)

A. Serial 0 is down, line protocol is down
B. Serial 0 is up, line protocol is up
C. Open: IPCP, CDPCP
D. LCP closed
E. LCP open

3. Company A has been assigned the CIDR block of 115.64.4.0/22 for its public network. Which of the following IP addresses can Company A use on its public network?

A. 115.64.8.32
B. 115.64.7.64
C. 115.64.6.255
D. 115.64.3.255
E. 115.64.5.128
F. 115.64.12.128

4. What functions do router perform in a network? (choose 2)
A. Packet switching
B. Access layer security
C. Path selection
D. VLAN membership assignment
E. Bridging between LAN segments
F. Microsegmentation of broadcast domain

5. A Cisco router has been received from another *******.com division. After connecting to the console of the router, you discover that the router has a configuration from a previous deployment.
What should be done before a new configuration in entered in the router?

A. RAM should be erases and the router restarted
B. Flash should be erased and the router restarted
C. NVRAM should be erased and the router restarted
D. The new configuration should be entered and saved

6. You is configuring a catalyst switch with VLAN information that must be automatically distributed to other catalyst switches in the network. What conditions must be met in order for the VLANs configured on the other switches? (choose 3)

A. The switch that will share the VLAN information must be in the VTP Server mode
B. The switches must be in the same VTP domain
C. The switch that will share the VLAN information must be configured as root bridge
D. The switches must be configured to use the same VTP version
E. The switches must be configured to use the same STP version
F. The switches must be configured to use the same type of ID tagging

7. Network topogy exhibit
E0
(Router1)----------------------------------Switch 3
| |
| |
| |
switch 2 Host C
|
|
|
Host A
Which destination addresses will be used by Host A to send data to Host C? (choose 2)

A. The IP address of Switch 2
B. The MAC address of Switch 2
C. The IP address of Host C
D. The MAC address of Host C
E. The IP address of the Router1’s E0 interface
F. The MAC address of the Router1’s E0 interface

[thewall]

Cau 2. gan lien cuoi cau 1

Host C nam o Switch 3

[thewall]

De ro hon cac anh chi co the xem file nay!

[Jetli]

Các bác mod làm ơn trả lời và giải thích gấp giùm em mấy câu trong ******** v29(Real Exam v37) nhá
QUESTION NO: 62
Which of the following features are PPP characteristics? (Choose all that apply.)
A. Encapsulates several different types of routing protocols.
B. Supports only IP.
C. Can be used over analog circuits. (tại sao lại chọn C )
D. Maps Layer addresses.
E. Corrects errors.
Answer: A C E
QUESTION NO: 79
The ******** network is shown in the following exhibit:
R1-------FrameRelay-------R2
What is the function of the Frame Relay DLCI with regard to ********1?
A. Defines the signaling standard between ********1 and ********2.
B. Classifies the encapsulation used between ********1 and ********2.
C. Identifies the circuit between ********2 and the frame switch.
D. Classifies the circuit between ********1 and ********2.
E. Defines the signaling standard between ********1 and the frame switch.
Tại sao lại chọn C
QUESTION NO: 80
Phiền mọi người xem giùm câu hỏi và cái hình trong ******** V29

QUESTION NO: 86
Which of the statements mentioned below describes the OSPF routing protocol? (Choose all that apply.)
A. It confines network instability to a single area of network.
B. It increases the routing overhead of the network
C. It supports VLSM
D. It routes between Autonomous Systems.
E. It allows extensive control of routing update
Answer: A, C, E
Chọn A,C chắc chắn đúng rùi. Còn E có đúng hông nhỉ?

QUESTION NO: 114
You are a network technician at ********, Inc. The ******** Engineering Department LAN is receiving obsolete information from the ******** Business Department’s network traffic broadcasting. You need to contain this traffic within the Business Department, but at the same time also maintain connectivity with enterprise services and the Internet.
How will you achieve this? (Choose all that apply.)
A. Use half and full-duplex Ethernet on the Engineering Department LAN
B. Establish a VTP domain to minimize the obsolete traffic
C. Change the switch IP address to a normal address
D. Create separate VLANs and subnets for the two departments and route between the two
E. Provide greater bandwidth to the Engineering Department LAN
F. Place the business department on a separate subnet and route between networks

QUESTION NO: 157
What are the basic network services that is provided by the Cisco IOS? (Select three options.)
A. Defines topology
B. Access to network resources
C. Routing and switching functions
D. Creation of VLANs
E. Quality of service

QUESTION NO: 194
When you execute Router# show frame-relay, which of the following command options will be displayed?
(Select three options.)
A. dlci
B. clients
C. pvc
D. neighbors
E. lmi
F. map
Câu này có phải đề bài sai ko nhỉ, vì chỉ có sh frame map|pvc|lmi …. thôi chứ

QUESTION NO: 198
Select two of the following statements that are characteristics of a Frame Relay point-to-point
subinterface.
A. Needs to use Inverse ARP.
B. Maps a single IP subnet per DLCI.
C. Maps a single IP subnet across multiple DLCIs.
D. Addresses and resolves NBMA split horizon issues.
E. Needs the frame-relay map command.
Answer: B, D
Chọn D có đúng ko ạ?

QUESTION NO: 210
How would you configure a router in a Frame Relay network to prevent issues such as split horizons
hampering routing updates?
A. Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the subinterface.
B. Configure many sub-interfaces on the same subnet.
C. Configure each Frame Relay circuit as a point-to-point line.
D. Configure only one sub-interface to establish multiple PVC connections.
E. Configure a single sub-interface connect to multiple remote router interfaces.

QUESTION NO: 222
With regard to ISDN, which of the following are true? (Choose all that apply.)
A. Legacy DDR can use port information to define interesting traffic.
B. Legacy DDR can configure multiple dialer configurations on the same interface.
C. Legacy DDR can use ACLs to define interesting traffic.
D. HDLC or PPP can be used to encapsulate ISDN D channel information.
E. The BRI interfaces on ISDN routers with dialer profiles configured cannot belong to multiple dialer
pools.
F. Dialer profiles cannot use ACLs to define interesting traffic.

[imported_g_dragon]

1. Proxy ARP
2. Câu 2 thì tùm lum quá nhưng tóm lại là. Nếu 2 bên đều có physical connection OK, encapsulation PPP, Nếu xài CHAP authentication thì, password 2 bên phải giống nhau, nếu chỉ dùng câu lệnh user name và password mà không khai báo gì thêm thì hostname của router này phải là username của router kia. Nếu thỏa mãn được các điều kiện trên thì B, E sẽ đúng, còn nếu là cisco router thì câu C sẽ đúng
3 B,E
4 A,C,F
5 C
6 A,B,D SAO LẠI YOU IS NHỈ
7 C,F

[thewall]

Xin cám ơn huynh rất nhiều! "Học thầy không tày học bạn" :D :)

[nqminh79]

Đây là một số câu hỏi ôn tập mong được trao đổi cùng các bạn.Thanks.

1. Which of the following is a correct statement?


a. Frame filtering assigns a VLAN ID to each frame.


b. Frame tagging is more scalable than frame filtering.


c. The frame tag is placed in the Layer 3 header.


d. The VLAN ID is added to the frame for transport across horizontal cabling links.
2.Which device, typically found in digital PBX's, performs Layer 2 and Layer 3 protocol functions?


a. NT1


b. NT2


c. TE1


d.TE2

3. When a router is using hold down timers, which update about a failed link is rejected?


a. An update from a different router with a better metric


b.An update from a different router with a poorer metric


c. An update from the same router with a better metric


d.An update from the same router with a poorer metric

4. At which layers of the OSI model do VLANs operate?


a. Application and Presentation


b. Data Link and Network


c.Physical and Transport


d. Physical and Data Link

5.What is another term for the "last-mile"?


a. CPE


b. Demarcation


c. Local Loop


d.Toll Network

6.All of the following statements about VLANs are true EXCEPT:


a. They are logical groupings of devices.


b. Users can be grouped by function.


c.VLANs are configured by software.


d. VLANs are standardized

7.Which type of network would typically use a static route for external traffic?


a. Fully meshed network


b. Multihomed network


c. Network with frequent topology changes


d. Stub network

8. What is a major advantage of circuit-switched networks over packet-switched networks?


a. It allows network devices to share a single point-to-point link.


b. It involves transmission of messages from node to node through a network.


c. It offers more flexibility and uses network bandwidth more efficiently.


d. It offers users dedicated bandwidth that cannot be infringed upon by other users

9.What are the two basic functions used by a router to relay packets?


a. Filtering and switching


b. Path determination and filtering


c. Path determination and switching


d.Traffic analysis and filtering

10. Which of the following is true regarding latency?


a.CSMA/CD requires no latency.


b. It is also called asymmetry.


c. It is based entirely on distance.


d. Networking devices add to latency.

11.Which statements describe the use of Link State Advertisements (LSA)? (Choose two.)


a. LSAs are generated when changes in the network occur.


b. Link state advertisements are refreshed every 60 minutes.


c. The router copies the information received from each LSA packet into the routing table.


d. Routers exchange LSAs to build and maintain topology databases.


e. Forwarding LSAs can increase the occurrence of routing loops.

12.What are the effects of LAN segmentation using a switch? (Choose three.)


a.dedicated bandwidth between source and destinations


b. enlarged collision domains


c. decreased broadcast domains


d. increased number of collision domains


e. increased latency in the network

13.Which functions are carried out by switches and bridges when building the CAM tables? (Choose three.)


a. builds the table using unknown source MAC addresses from received frames


b. builds the table using unknown destination MAC addresses from received frames


c. time stamps the entries for each address


d. time stamps the BPDU of each frame received


e. maps switch port numbers with the associated MAC address


f. maps switch port numbers with the associated network address

14.Which of the following do switches send at regular intervals to eliminate switching loops?


a. bi-directional protocol data units


b. binary protocol data units


c. bridge protocol data units


d. buffered protocol data units

15.Which of the following are functions of a WAN? (Choose three.)


a. permit real-time communication between users


b. allow users access to high bandwidth


c. provide full-time local service


d. provide e-mail and e-commerce services


e. connect physically adjacent devices


f. provide access to computers in other locations

16.What is the purpose of the IOS enable secret command?


a. to set password protection on incoming Telnet sessions


b. to set password protection on the console terminal


c. to allow a user access to User mode


d. to allow a user to enter a password that will be encrypted

17.What is the function of the first phase of PPP negotiation?


a. link termination


b. authentication of communicating peers


c. link establishment and configuration


d. network layer protocol configuration

18.Diagram:
Sw1---------Sw2---------Sw3---------Sw4
server client transparent server
vtp domain: cisco
trunking protocol: isl
The switches in the graphic are configured for VTP as shown. Select the statements that correctly describe the operation of these switches. (Choose two.)


a. A new VLAN can be added to Switch1 and that information will be added only to Switch2.


b. An existing VLAN can be deleted from Switch2 and that VLAN will be deleted from Switch1 and Switch4.


c. A new VLAN can be added to Switch4 and that information will be added to Switch1, Switch2, and Switch3.


d. A new VLAN can be added to Switch1 and that information will be added to Switch2 and Switch4.


e. A new VLAN can be added to Switch3 and that information will be added to Switch1, Switch2, and Switch4.


f. An existing VLAN can be deleted from Switch4 and that VLAN will be deleted from Switch1 and Switch2.

19.Which of the following EIGRP functions is the responsibility of the IP protocol-dependent module (PDM)? (Choose three.)


a. the calculation of successor and feasible successor routes for IP and IPX traffic


b. the notification of DUAL when IP routing information is received


c. the communication of information about IP routes with neighbor routers


d. the maintenance of the IP routing table


e. the exchange of hello packets with other IP-enabled routers


f. the insertion of lowest cost paths into the routing table

20.Which of the following messages are sent from a DHCP server to a client during a successful configuration process? (Choose two.)


a. DHCPDISCOVER


b. DHCPOFFER


c. DHCPREQUEST


d. DHCPACK

21.An administrator has an older 1900 switch located on the edge of the network. What can the network administrator do to ensure that it does not become the root bridge of the spanning-tree network?


a. decrease the BPDU hello timer update on the 1900


b. assign the highest IP address to the switch that should be the root


c. assign the lowest IP address to new root bridge


d. assign the lowest priority to the switch that should be the root


e. assign the highest priority to the new root bridge


f. decrease the BID on the 1900 switch

22.What reduces the problems of routing loops due to incorrect updates?


a. count to infinity


b. distance vector timers


c. event-triggered updates


d. split horizon

23.Which of the following are benefits of creating a subnetwork structure in an IP network? (Choose three.)


a. permits network address duplication


b. allows for address flexibility


c. prevents address replication


d. provides broadcast containment


e. adds low-level security


f. allows for more network hosts available

24.Which of the following LAN hosts are most likely to require full rather than half duplex ethernet connections? (Select two.)

A. File server

B. Workstation

C. Proxy server

D. Web server
25.Which of the following networking devices is paired with the layer of the OSI model that would best describe its core functionality? (Select all that apply.)

A. Repeater, Layer 1.

B. Bridge, Layer 2.

C. Switch, Layer 4.

D. Router, Layer 3.

E. Gateway, Layer 3.
26.Which of the following are configuration modes that are available once Privileged EXEC mode is entered when logged into the IOS CLI via the console cable? (Select all that apply.)

A. Global configuration mode

B. Auxiliary configuration mode

C. Router configuration mode

D. UTP configuration mode

E. Line configuration mode

F. Interface configuration mode

[thewall]

Mong được giải thích rỏ hơn câu 3
Câu 4 thì mình nghĩ câu E cũng đâu có sai! Thế câu nào mới chính xác

[meoluoidethuong]

1.Which statement describes the routing protocol OSPF (choose 3)

A.It supports VLSM
B.It is used to between Autonomous systems
C.It confines network instability to one area of network
D.It increases routing overhead over the network
E.It allows extensive control of the routing update
F.it is simpler to configure than RIPv2

2. Error detection schemes use which field of frame to detect error?

A.MTU
B.MAC
C.FCS
D.PDU
E.ERR
F. Flag

3. Which of the following are characteristics of microsegmentation? (Choose two)

A. Dedicated paths between sending and receiving host are established
B. the number of collision domains is decreased
C. Broadcast domain are enlarged
D. Multiple subnetwork broadcast addresses are created
E. Multiple ARP tables are required on the connected hosts
F. Bandwidth is dedicated to connect hosts

4. Which statement describes the rule of split horizon?

A. Only routers can split boundaries (horizons) between concentric networks.
B. All distance vector protocols require fall back routers that may cause momentary loops as the topology changes.
C. Networks can only remain fully converged if all information about routers is sent out all active interfaces.
D. Information about a route should not be sent back in the direction from which the original update come.
E. Each AS must keep routing tables converged to prevent dead routes from being advertised across the AS boundary.

5. A network host is configured as follows: Host IP address: 192.168.16.183 Subnet mask:255.255.255.224 Default gateway: 192.168.16.190. Which of the following statements describe the network to which this host is attached? (Choose three)

A. The default gateway is configured on a different subnet form this host.
B. The host is a member of the fifth usable subnet of the 192.168.16.0 network.
C. The sub network address for this host is 192.168.16.160/28.
D. The address of the next higher subnet is 192.168.16.192.
E. The address of the router interface that is attached to this sub network is 192.168.16.190.
F. There are 60 usable host addresses on this subnet.

6. You have configured a new Frame Relay link on a router that is using IGRP.
Which command would you use to set the IGRP metric for the speed of this link?

A. Contoso Router(config)# IGRP metric 256K
B. Contoso Router(config)# bandwidth 256
C. Contoso Router(config-if)# metric 256K
D. Contoso Router(config-if)# bandwidth 256

7. What is a global command?

A. A command that is available in every release of IOS, regardless of the version or deployment status.
B. A command that can be entered in any configuration mode.
C. A command that is universal in application and supports all protocols.
D. A command that is implemented in all foreign and domestic IOS version.
E. A command that is set once and affects the entire router.

8. An administrator has decided to use the private address 172.20.0.0 for the internal network. If the maximum number of hosts allowed on a subnet is 62, which of the following is true regarding the addressing scheme?

A. 172.20.62.255 is a host address.
B. Ten bits were borrowed for subnets.
C. 255.255.255.252 is the subnet mask.
D. 172.20.255.64 is a subnet address.
E. Seven host bits must be used to meet the addressing scheme requirement.

9. What feature of a networks switch allows an administrative to create separate broadcast domains?

A. Store-and-forward switching
B. Micro segmentation
C. Transparent bridging
D. Fragment-free switching
E. Virtual LANs
F. Cut-through switching

10. Which of the following options lists the steps in PPP session establishment in the correct order?

A. Optional authentication phase, link establishment phase, network layer protocol phase.
B. Network layer protocol phase, link establishment phase, optional authentication phase.
C. Network layer protocol phase, optional authentication phase, link establishment phase.
D. Link establishment phase, network layer protocol phase, optional authentication phase.
E. Link establishment phase, optional authentication phase, network layer protocol phase.
F. Optional authentication phase, network layer protocol phase, link establishment phase.

11. Which Frame Relay feature is responsible for transmitting keep alive to ensure that the PVC does not shut down because of inactivity?

A. DLCI
B. BECN
C. FECN
D. LMI
E. CIR
F. DE

12. Which characteristics are representative of a link-state routing protocol? (Choose three)

A. Provide common view of entire topology
B. Exchange routing tables with neighbors.
C. Calculates shortest path.
D. Utilizes event triggered updates.
E. Utilizes frequent periodic updates.

13. Which of the following contribute to congestion on an Ethernet network. (Choose two)

A. Use of full duplex mode.
B. Creation of new collision domain.
C. Creation of new broadcast domain.
D. Addition of hub to the network.
E. Use of switches in the network.
F. Amount of ARP or IPX SAP traffic.

14. Exhibit:

Which of the following is the minimum configuration commands required to bring up the ISDN link shown in graphic. Note : SPIDs are not required for this switch. (Choose three)

A. Router(Config-if)# encapsulation PPP
B. Router(Config-if)# isdn switch-type type
C. Router(Config-if)# dialer-list, protocol ip permit
D. Router(Config-if)# dialer map ip address name name connection number.
E. Router(Config-if)# ip address subnet mask
F. Router(Config-if)# dialer group 1

15. The command frame - relay map ip 10.121.16.8.102 broadcast was entered on the router. Which of the following statement is true concerning this command?

A. This command should be executed from the global configuration mode.
B. The IP address 10.121.16.8 is the local router part used to forward data
C. 102 is the remote DLCI that will receive the information.
D. Command is required for all frame relay configuration.
E. The broadcast option allows packet, such as RIP update, to be forwarded across the PVC.
command fail 10.121.16.8.102
16. Exhibit:

MTU 1500 bytes, Bw 10000 Kbit, Dly 1000 Usec.reliability 128/255, txload 1/255, rxload 1/255Encapsulation Arpa, loop back not seCKeepalive set (10 Sec)ARP type: Arpa, Arp Timeout 04:00:00Last Input 21:24:36, output 00:00:08, output hang never last clearing of "show interface" countees never Queuing strategy: FIFO Output queue 0/40, 0 drops; input queue 0/75: drops5 min input rate 0 bits/sec, 0 packets/sec 5 min output rate 0 bits/sec, packets/sec75427 packet input, 10685636 bytes, 0 buffer Received 75427 broadcast, 933 runts, 253 giants, 0 throttles0 input error, 0 cvc, 0 frame. 0 overrun, 0 ignored0 input packet with dribble condition detected78387 packet output, 7329230 bytes, 0 under nuns.

During routine network maintenance, a technician issues the show interface E0 command. A partial output of the command is shown in exhibit which values displayed in the command output could indicate that collisions have occurred (Choose two)

A. MTV 1500 bytes
B. Reliability 128/255
C. 933 runts
D. 75427 broadcasts
E. 78387 packets output
F. 253 giants

17. Exhibit:

Given the topology as illustrated, what commands are needed to configure IGRP on the Contoso1 Router? (Choose three)

A. Contoso1 (config ) # Router IGRP 100
B. Contoso1 (config) # router IGRP
C. Contoso1 (config - router) # network 192.168.6.0
D. Contoso1 (config - router) # network 192.168.7.0
E. Contoso1 (config - router) # network 192.168.8.0
F. Contoso1 (config - router) # network 192.168.9.0
not show picture
18. Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two)

A. Transport layer divides a data stream into segments & adds reliability & flow control information
B. Data link layer adds physical source & destination address & an FCS to the segment
C. Packets are created when the network layer encapsulate a frame with source & destination host address & protocol related control information
D. Packets are created when the network layers adds layers 3 address & control information to a segment
E. The presentation layer translated bits into bits into voltages for transmission across the physical link

19. Exhibit:

After Configuring the router show in the exhibit, the from the technician's laptop to all of the interface on each router were successful, if a technician initiates a telnet session to Router Contoso1 and issues the show arp command, which of the following items will be among the entries displayed in the output?

A. The MAC address of the S0 interface on Router Contoso1
B. The MAC address of the E0 interface on Router Contoso1
C. The MAC address of the S0 interface on Router Contoso2
D. The MAC address of the E0 interface on Router Contoso2

20. Exhibit:

Given a Network with a switched topology as illustrated. What will be the result if the Spanning-Tree Protocol is disabled on all the switches? (Choose two)

A. Broadcast Storm will occur.
B. Broadcast Storm will be detected quickly.
C. At least one link will be placed in standby.
D. Loops will occur.
E. Loops will be detected quickly.


21. The Frame relay circuit between Contoso1 & Contoso2 is experiencing congestion. Which type of notification are used to alleviate the congestion? (Choose three)

A. FECN
B. CIR
C. BECN
D. DE
E. DLCI 100 is Down

22. What does a configuration Register Setting of 0x2105 indicate to the Router?

A. The Boot IOS Code is Located in the NVRAM.
B. Check NVRAM for boot system Commands.
C. Bypass NVRAM Configurations.
D. Boot the IOS Code Located in ROM.
E. Perform a Password Recovery.
F. Bypass The Code In ROM.

23. All WAN links is side the Contoso.com network use PPP with for authentication security. Which command will display the CHAP authentication process as it occurs between two routers in the network.

A. show CHAP authentication
B. show interface serial 0
C. debug PPP authentication
D. debug CHAP authentication
E. show PPP authentication CHAP
24. Which of the following if addresses can be assigned to host devices (Choose two)

A. 205.7.8. 32/27
B. 191.168. 10. 2/23
C. 127.0.0.1
D. 224.0.0.10
E. 203.123.45. 47/28
F. 10.10.0.0/13

25. How many usable sub network and usable hosts per subnet result in the network address 201.105.13.0 is sub netted with a mask of /26?

A. 64 network and 4 hosts
B. 4 network and 64 hosts
C. 2 network and 62 hosts
D. 62 network and 2 hosts

[Linhnq]

Hi Anh Minh & mọi người !!!

75 câu hỏi của anh đưa ra em thấy hầu như mọi người đã đọc và làm hết rồi nhưng về đáp án thì mọi người "cãi nhau" ghê qúa... Theo em nghĩ tốt nhất anh hệ thống lại hộ bọn em đáp án 75 câu này theo anh là chính xác nhất có thể. Như thế em thấy hiệu quả hơn.

Cám ơn anh Minh !

[Thang Tam]

Q63. You are a network technician at CiscoSystem, Inc. You are troubleshooting a connectivity problem. You issue the ping command during a router console session. Your trainee wants to know what the ping command use to test connectivity between the two devices. What would your reply be?
A. ICMP echo request
B. Information interrupt request
C. Timestamp reply
D. Source quench

Q182. Which of the following are the routing protocols that are capable of supporting a network that uses VLSM and route summarization? (Select three options.)
A. IGRP
B. EIGRP
C. RIP v1
D. RIP v2
E. OSPF
F. VTP
G. LSA

Q196. What does the concept route aggregate mean when one talks about using variable subnet masking?
A. Deleting unusable addresses through the creation of many subnets.
B. Combining routes to multiple networks into one supernet.
C. Reclaiming unused space by means of changing the subnet size.
D. Calculating the available host addresses in the AS.
















Q213. Study the Exhibit below carefully:

Which of the following is the correct IP address configuration for HostA?
A. IP 192.168.100.31 255.255.255.240 default-gateway 192.168.100.18
B. IP 192.168.100.30 255.255.255.240 default-gateway 172.16.1.1
C. IP 192.168.100.20 255.255.255.240 default-gateway 192.168.100.17
D. IP 192.168.100.21 255.255.255.248 default-gateway 192.168.100.17
E. IP 192.168.100.19 255.255.255.248 default-gateway 172.16.1.1

Q236. You are the network technician at CiscoSystem. You tell your newly appointed CiscoSystem trainee that discontiguous networks in the IP addressing scheme can create problems when a routing protocol tries to identify the next hop. Your trainee now wants to know which routing protocols can be used to minimize the effects of these problems
What will your reply be? (Choose all that apply)

A. IGRP
B. ICMP
C. OSPF
D. RIP v1
E. RIP v2
F. EIGRP





Q254. You are the network administrator at CiscoSystem. You want to configure a default route to any destination network not found in the routing table on router TK1.
Which of the following commands can you issue?
A. TK1(config)# ip default-route 0.0.0.0 255.255.255.255 s0
B. TK1(config)# ip route 0.0.0.0 255.255.255.255 s0
C. TK1(config)# ip default-route 0.0.0.0 s0
D. TK1(config)# ip route 0.0.0.0 0.0.0.0 s0
E. TK1(config)# ip route any any e0

Q265. With regard to classless routing protocols, which of the following statements are true? (Choose two.)
A. Discontiguous subnets are not allowed.
B. Variable length subnet masks are allowed.
C. RIP v1 is a classless routing protocol.
D. IGRP supports classless routing within the same autonomous system.
E. RIP v2 supports classless routing.

Q293. You are the network administrator at CiscoSystem. The CiscoSystem network uses RIP as its routing protocol. A portion of the CiscoSystem network is shown in the following exhibit:


You want to create a gateway of last resort.
What command should you issue?
A. ********1(config)# ip route 172.16.4.2 0.0.0.0 0.0.0.0
B. ********1(config)# ip route 0.0.0.0 0.0.0.0 S1
C. ********1(config)# ip route 172.16.4.1 0.0.0.0 0.0.0.0
D. ********1(config)# ip route S0 0.0.0.0 0.0.0.0
E. ********1(config)# ip route 0.0.0.0 0.0.0.0 172.16.4.2


Q302
Your boss at Cisco.com asks you which routing protocols that supports VLSM.
What should you tell her? (Select three)
A. IP
B. RIPv1
C. EIGRP
D. OSPF
E. IGRP
F. RIPv2

Q303
Your boss at Cisco.com asks you which routing protocols that supports VLSM.
What should you tell her? (Select three)
A. RIPv1
B. IGRP
C. EIGRP
D. OSPF
E. IS-IS
F. CDPv2

Q305
You work as a network consultant. You are required to design a Cisco network for Cisco.com, a large company. Cisco has the following requirements on the network:
• minimal bandwidth for routing updates should be used
• quick converging
• support VLSM, CIDR, IP, and IPX.
What routing protocol should you suggest?
A. RIPv1
B. RIPv2
C. IGRP
D. OSPF
E. EIGRP

[Thang Tam]

Q1. Which of the following factors determines the OSPF router ID when configuring a router with both physical and logical interfaces?
A. The lowest network number of any interface.
B. The highest network number of any interface.
C. The highest IP address of any logical interface.
D. The middle IP address of any logical interface.
E. The lowest IP address of any physical interface.
F. The highest IP address of any physical interface.
G. The lowest IP address of any logical interface.

Q12. What could be the rationale behind using passive-interface command when configuring a router?
A. Allows interfaces to share common IP addresses.
B. Allows an interface to remain up without the aid of keepalives.
C. Allows a router to send routing and not receive updates via that interface.
D. Allows a routing protocol to forward updates that is missing its IP address.
E. Allows a router to receive routing updates on an interface but not send updates via that interface.

Q27. What are the characteristic of link state routing protocols? (Choose three.)
A. The exchange of advertisement is triggered by a change in the network.
B. All routers exchange routing tables with each other in a multipoint network.
C. Packets are routed based upon the shortest path to the destination.
D. Paths are chosen depending on the cost efficiency factor.
E. Every router in an OSPF area is capable of representing the entire network topology.
F. Only the designated router in an OSPF area can represent the entire network topology.

Q32. You are a network technician at CiscoSystem. A newly appointed trainee wants to know what the basics of distance vector and link state routing protocols are.
What would your reply be? (Choose two.)
A. Distance vector protocols send the entire routing table to directly connected neighbors.
B. Distance vector protocols are responsible for sending updates to all networks listed in the routing table.
C. Link state protocols are responsible for sending the entire routing table to the whole network.
D. Link state protocols send updates regarding their own links status to all other routers on the network.


Q82. What will be the calculated OSPF cost of an OSPF interface that has been configured with the bandwidth 64 command?
A. 1 B. 10
C. 64 D. 1562
E. 64000 F. 128000

Q84. Which of the following statements is true regarding the command sequence illustrated below? (Choose three.)
CiscoSystemA(config)# interface loopback 0
CiscoSystemA(config-if)# ip address 192.168.16.24 255.255.255.255

A. It creates a virtual, software only, interface.
B. It provides a way to test the convergence of OSPF routing updates.
C. The mask of 255.255.255.255 is called a host mask.
D. It uses a wildcard mask of 255.255.255.255.
E. It ensures that an interface is always active for OSPF processes.
F. These commands can only be issued to configure serial interfaces.

Q86. Which of the statements mentioned below describes the OSPF routing protocol? (Choose three.)
A. It confines network instability to a single area of network.
B. It increases the routing overhead of the network
C. It supports VLSM
D. It routes between Autonomous Systems.
E. It allows extensive control of routing update

Q111. Why is it a wise decision to use a hierarchical design on OSPF networks? (Choose three options.)
A. To reduce the complexity of router configuration
B. To speed up convergence
C. To confine network instability to single areas of the network
D. To reduce routing overhead
E. To lower costs by replacing routers
F. To decrease latency by increasing bandwidth













Q112. You are a network technician at CiscoSystem, Inc. You have been asked to add a new router into an established OSPF network. The CiscoSystem networks attached to the new router do not appear in the routing tables of the other OSPF routers. Given the information in the partial configuration shown below, what configuration error is causing this problem?
Router(config)# router ospf 1
Router(config-router)# network 10.10.10.0 255.0.0.0 area 0
A. The AS is not correctly configured
B. The network subnet mask is incorrectly configured
C. The network wildcard mask is configured incorrectly
D. The network number is not correctly configured
E. The process id is configured incorrectly

Q113. You are a network technician at CiscoSystem, Inc. You need to configure a router to run OSPF and to add network 192.168.10.0/24 to OSPF area 0.
Which of the following commands do you need to achieve this? (Choose two.)
A. Router(config-router)# network 192.168.10.0 0.0.0.255 0
B. Router(config-router)# network 192.168.10.0 0.0.0.255 area 0
C. Router(config-router)# network 192.168.10.0 255.255.255.0 area 0
D. Router(config)# router ospf 0
E. Router(config)# router ospf 1
F. Router(config)# router ospf area 0

Q115. OSPF routing makes use of areas. What are the characteristics of these areas? (Choose two options.)
A. Hierarchical OSPF networks do not need multiple areas
B. Multiple OSPF areas must connect to area 0
C. Single area OSPF networks must be configured in area 1
D. Areas can be assigned any number from 0 to 63535
E. Area 0 is called the backbone area
F. Each OSPF area need to be configures with a loopback interface

Q120. On which of the following types of network will OSPF elect a backup designated router?
A. Point-to-point and point-to-multipoint casting
B. Nonbroadcast and broadcast multipoint casting
C. Point-to-point and multi-access broadcasting
D. Point-to-multipoint and multi-access broadcasting
E. Nonbroadcast and broadcast multiaccess

Q124. Which of the following EIGRP route entries would be described as a feasible successor?
A. A primary route, stored in the routing table
B. A backup route, stored in the routing table
C. A backup route, stored in the topology table
D. A primary route, stored in the topology table
Q131. Which of the following are features of the routing protocol EIGRP? (Select two options.)
A. Has a maximum hop count of 25
B. Can differentiate between internal and external routes
C. Uses a 32-bit metric
D. Can maintain only one routing table
E. Need all networks to use the same subnet mask
F. Supports only one routed protocol

Q132. Which of the different types of packets mentioned below is sent by routers running OSPF to maintain connectivity with neighboring routers?
A. OSP packets
B. hello packets
C. keepalive packets
D. dead interval packets


Q133. Your trainee wants to know what information a router runs through a link-state protocol to build and maintain its topological database. What can you tell her? (Select two options.)
A. LSAs from other routers
B. Beacons received on point-to-point links
C. hello packets
D. Routing tables received from other routers
E. SAP packets sent by other routers
F. TTL packets from exclusive routers

Q139. When dealing with point-to-point networks, which address are OSPF hello packets addressed to?
A. 127.0.0.1 B. 192.168.0.5
C. 223.0.0.1 D. 172.16.0.1
E. 224.0.0.5 F. 254.255.255.255.255

Q149. One of your trainees wants to know what the calculated OSPF cost of the link will be if the interface has been configured with the bandwidth 64 command. What will you tell her?
A. 128000 B. 64000
C. 1582 D. 10
E. 1







Q163. One of the features of the OSPF routing protocol is that it maintains a topology database of information about other routers in the network.
Which of the following is a characteristic of this topology database?
A. All entries in the topology database will be included on each router.
B. All routers in the same OSPF area will have one topology database.
C. The Dijkstra algorithm is used in the creation of the topology database.
D. LSA packets are used to update and maintain the topology database

Q173. Which of the following statements can you use to describe the process identifier that is used to run OSPF on a router? (Select two options.)
A. It is needed to identify a unique instance of an OSPF database.
B. It is an optional parameter only necessary if multiple OSPF processes are used.
C. It is locally significant.
D. It is globally insignificant
E. All routers in the same OSPF area must have the same process ID to exchange routing information.
Q175. Study the Exhibit below carefully:

You are the network administrator at CiscoSystem. CiscoSystemA is using multiple routing protocols according to the exhibit. Assuming that all networks that are connected are advertised, there are no redistribution of routes, and all other parameters are set to default, which path do you think will CiscoSystemA use to reach CiscoSystemD?
A. It will take the route via CiscoSystemB.
B. It will take the route via CiscoSystemC.
C. It will use the route with the highest metric.
D. It will load balance over both paths.
E. It will take the shortest route

Q212. Assuming that all OSPF routers in a particular area are configured with identical priority values, which of the following values would a router use for OSPF router ID when it does not have a loopback interface?
A. The IP address of the first Fast Ethernet interface.
B. The IP address of the console management interface.
C. The highest IP address among its active interfaces.
D. The lowest IP address among its active interfaces.
E. The priority value until a loopback interface is configured.

Q224. You are a technician at CiscoSystem. Your newly appointed CiscoSystem trainee wants to know what the maximum number of hops are that OSPF allows before marking a network as unreachable.
What would your reply be?
A. 15
B. 16
C. 99
D. 255
E. Unlimited
F. OSPF doesn't use hop count

Q230. You are a trainee technician at CiscoSystem. Your instructor tells you that the OSPF routing protocol maintains a topology database of information about other routers in the network. Your instructor wants to know what the characteristics of this database are.
What would your reply be? (Choose two)
A. The Dijkstra SPF algorithm is used to create the topology database.
B. All entries listed in the topology database will be included in the routing tables on each router.
C. The topology database is a routing table for which no path decisions have been made.
D. Each router in the OSPF area will have a unique topology database.
E. The topology database is updated by link-state advertisements (LSAs).

Q234. You are the network administrator at CiscoSystem. CiscoSystem has an OSPF network. You want to observe the DR/BDR election process in the CiscoSystem network. What command can you issue in privileged EXEC mode to accomplish this?
A. CS#show ip ospf interface
B. CS#Show ip ospf priority
C. CS#Show ospf neighbor detail
D. CS#Show ospf processes
E. CS#Show ospf neighbor state


Q251. You are a network administrator at CiscoSystem. To routers on the CiscoSystem network, router TK1 and router TK2 are configured to run OSPF. However, the two routers cannot establish an adjacency relationship on their common Ethernet link. In troubleshooting this problem you issue the show ip ospf interface e0 command for routers TK1 and TK2. The output from the command is shown in the following
exhibit:
TK1: Ethernet is up, line protocol is up
Internet address 192.168.1.2/24, Area 0
Process ID 1, Router ID 192.168.31.33, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 192.168.31.33, Interface address 192.168.1.2
No backup designated router on this network
Time intervals configured, Hello 5, Dead 20, Wait 20, Retransmit 5
TK2: Ethernet0 is up, line protocol is up
Internet address 192.168.1.1/24, Area 0
Process ID 2, Router ID 192.168.31.11, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 192.168.31.11, Interface address 192.168.1.1
No backup designated router on this network
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Based on the exhibit, what is the probable cause of this problem?
A. The OSPF area is misconfigured.
B. The priority on TK2 should be set lower.
C. The cost on TK2 should be set lower.
D. The hello and dead timers are misconfigured.
E. You need to add a backup designated router to the network.
F. The OSPF process ID numbers do not match.

Q256. You are the network administrator at CiscoSystem. Your newly appointed CiscoSystem trainee wants to know what the default administrative distance of OSPF routing protocol is.
What will your reply be?
A. 90
B. 100
C. 110
D. 120
E. 170

Q257. You are the network administrator at CiscoSystem. You must configure a router for load balancing across 4 unequal cost paths on the CiscoSystem network.
Which of the following routing protocols can you use? (Choose two.)
A. RIP v1
B. RIP v2
C. IGRP
D. EIGRP
E. OSPF
F. VLSM


Q260. Which of the following routing protocols minimize the effects of the problems created by discontiguous networks? (Choose three.)
A. RIP v1
B. RIP v2
C. EIGRP
D. IGRP
E. OSPF
F. VLSM

Q274. With regard to the OSPF Hello protocol, which of the following statements are true? (Choose two.)
A. The OSPF Hello protocol provides dynamic neighbor discovery.
B. The OSPF Hello protocol detects unreachable neighbors in 90 second intervals.
C. The OSPF Hello protocol maintains neighbor relationships.
D. The OSPF Hello protocol negotiates correctness parameters between neighboring interfaces.
E. The OSPF Hello protocol uses timers to elect the router with the fastest links at the designated router.
F. The OSPF Hello protocol broadcast hello packets throughout the internetwork to discover all routers that are running OSPF.

Q287. You are the network administrator at CiscoSystem. You are troubleshooting an EIGRP problem on Router TK1. You want to check the IP addresses as well as the retransmit interval and the queue counts for the devices which have established an adjacency with Router TK1.
What command should you issue?
A. TK1#show ip eigrp adjacency
B. TK1#show ip eigrp topology
C. TK1#show ip eigrp interfaces
D. TK1#show ip eigrp neigbors

Q300
Your boss, CiscoSystem, is curious about EIGRP route information. She asks you which EIGRP route information are held in RAM and maintained through the use of hello and update packets.
What should you tell Tess? (Select two.)
A. Neighbor Table
B. SRF Table
C. RTP Table
D. Topology Table
E. Quey Table

Q306
Exhibit: bandwidth 64
You work as a technician at Cisco.com. You have an OSPF interface configured with the command displayed in the exhibit.
What is the calculated OSPF cost of this link?
A. 1
B. 10
C. 1562
D. 64000
E. 128000

Q311
Your boss at Cisco.com is interested in the concept of OSPF routing areas.
What are the characteristics of OSPF areas? (Choose three.)
A. Each OSPF area requires a loopback interface to be configured.
B. Areas may be assigned any number from 0 to 65535.
C. Area 0 is called the backbone area.
D. Hierarchical OSPF networks do not require multiple areas.
E. Multiple OSPF areas must connect to area 0.
F. Single area OSPF networks must be configured in area 1.

[Thang Tam]

Q2. Which of the following routes will be used to forward data in a situation where a routing table contains static, RIP, and IGRP routes destined to the same network with each set to its default administrative distance?
A. The RIP route
B. The static route
C. The IGRP route
D. All three will load balance.

Q7. You are a network administrator at CiscoSystem. You are troubleshooting a router problem. You issue the show ip route command on one of the routers. The output from the command is shown in the following exhibit:

What does [120/3] represent?
A. 120 is the bandwidth allocation and 3 is the routing process number.
B. 120 is the administrative distance and 3 is the metric for that route.
C. 120 is the value of the update timer and 3 is the number of updates received.
D. 120 is the UDP port for forwarding traffic and 3 is the number of bridges.

Q19. You are a network technician at CiscoSystem. You are troubleshooting a LAN connectivity problem. Which of the following router IOS commands could you use? (Select three options.)
A. show ip route B. winipcfg
C. tracert D. show interfaces
E. traceroute F. ping

Q33. Which of the following statements is true regarding the split horizon rule?
A. Distance vector protocols need fall back routes that are responsible for momentary loops.
B. Networks can only remain fully operational provided all information is sent out all active interfaces.
C. Each AS must keep routing tables converged to avoid dead routes from being advertised.
D. Information about a route should not be sent back in the direction from which the original update came.
E. Only routers can split boundaries (horizons) between concentric networks.

Q39. You are a network administrator at CiscoSystem. The CiscoSystem network has three remote networks are accessed through serial 0/0 interface on the CiscoSystem1 router. The remote networks are: 172.16.10.0, 172.16.20.0, and 172.16.30.0. However, users cannot access 172.16.20.0. You are troubleshooting the problem. You issue the debug ip rip and show ip route commands. The output form the command is shown in the following exhibit:
<some output text is omitted>
CiscoSystem1# debug ip rip
ld00h: RIP:received vl update from 172.16.100.2 on Serial0/0
ld00h: 172.16.10.0 in 1 hops
ld00h: 172.16.20.0 in 1 hops
ld00h: 172.16.30.0 in 1 hops
CiscoSystem1# show ip route
Gateway of last resort is not set
172.16.0.0/24 is subnetted, 8 subnets
C 172.16.150.0 is directly connected, FastEthernet0/0
C 172.16.220.0 is directly connected, Loopback2
C 172.16.210.0 is directly connected, Loopback1
C 172.16.200.0 is directly connected, Loopback0
R 172.16.30.0 [120/1] via 172.16.100.2, 00:00:07, Serial0/0
S 172.16.20.0 [1/0] via 172.16.150.15
R 172.16.10.0 [120/1] via 172.16.100.2, 00:00:07, Serial0/0
C 172.16.100.0 is directly connected, Serial0/0

What is the most likely cause of the problem?
A. 172.16.20.0 is not located in CiscoSystem1’s routing table.
B. There is no gateway of last resort on CiscoSystem1.
C. The static route for 172.16.20.0 is incorrect.
D. The CiscoSystem1 router is not receiving 172.16.20.0 updates

Q41. You are a network technician at CiscoSystem, Inc. You are currently troubleshooting a Cisco router. You issue the show ip route command. The output from the command is displayed in the following exhibit:
CiscoSystem1#show ip route
Codes: C - connected, S - static, I - IGRP, R- RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inner area
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - Candidate default
U - per-user static route
Gateway of last resort is not set
R 192.168.8.0/24 [120/1] via 192.168.2.2, 00:00:10, Serial0
C 192.168.9.0/24 is directly connected, Serial1
R 192.168.10.0/24 [120/7] via 192.168.9.1, 00:00:02, Serial1
R 192.168.11.0/24 [120/7] via 192.168.9.1, 00:00:03, Serial1
C 192.168.1.0/24 is directly connected, Ethernet0
C 192.168.2.0/24 is directly connected, Serial0
R 192.168.3.0/24 [120/1] via 192.168.2.2, 00:00:10, Serial0
R 192.168.4.0/24 [120/15] via 192.168.2.2, 00:00:10, Serial0
R 192.168.5.0/24 [120/15] via 192.168.2.2, 00:00:10, Serial0
R 192.168.6.0/24 [120/15] via 192.168.2.2, 00:00:10, Serial0
R 192.168.7.0/24 [120/1] via 192.168.2.2, 00:00:10, Serial0
Which route will not be entered into the routing table of a neighboring router?
A. R 192.168.11.0/24 [120/7] via 192.168.9.1, 00:00:03, Serial1
B. C 192.168.1.0/24 is directly connected, Ethernet0
C. R 192.168.8.0/24 [120/1] via 192.168.2.2, 00:00:10, Serial0
D. R 192.168.5.0/24 [120/15] via 192.168.2.2, 00:00:10, Serial0

Q49. What could you use to prevent rooting loops in the network when configuring the network using a distance vector routing protocol? (Choose two.)
A. Spanning Tree Protocol
B. Shortest path first tree
C. Link-state advertisements (LSA)
D. Hold-down timers
E. Split horizon
F. VRP

Q50. The following exhibit shows the router topology for the CiscoSystem network.



All routers are running RIP. Which of the following statements describe how the routers exchange their
routing tables? (Choose all that apply.)
A. CiscoSystem4 exchanges with CiscoSystem3.
B. CiscoSystem4 exchanges with CiscoSystem2.
C. CiscoSystem4 exchanges with CiscoSystem1.
D. CiscoSystem1 exchanges with CiscoSystem3.
E. CiscoSystem1 exchanges with CiscoSystem2.
F. CiscoSystem1 exchanges with CiscoSystem4.

Q60. Which of the following statements describes the rule of split horizon?
A. Only routers can split boundaries (horizons) between concentric networks.
B. Each AS must keep routing tables converged to prevent dead routes from being advertised across boundaries.
C. Networks can only remain fully converged if all information is sent out all active interfaces.
D. Information about a route should not be sent back in the direction from which the original update came.
E. Distance vector protocols need fall back routers that are responsible for momentary loops.

Q73. You are a network technician at CiscoSystem, Inc. You received reports that users on the CiscoSystem2 Ethernet site cannot access the CiscoSystem1 network site. You issue the show running-config command.
The output form the command is shown in the following exhibit:

After reviewing the command output, what is the most likely cause of the problem?
A. Link state routing protocol is missing.
B. Incorrectly configured IP addresses
C. IGRP is incorrectly configured.
D. Frame relay is not configured.

Q76 : You are a network technician at ********, Inc. You received a report that users on the 172.17.22.0 network are unable to reach the server located on the 172.31.5.0 network. You connected to router ********1 via the console port, issued the show ip route command, and could ping the server. The network topology and the output from the show ip route is shown in the following exhibit:




Cisco1#show ip route
Codes: C – connected, S – static, I – IGRP, R- RIP, M – mobile, B – BGP D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inner area E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, * - Candidate default U – per-user static route
Gateway of last resort is 172.19.22.2 to network 0.0.0.0
C 172.17..22.0/24 is directly connected, FastEthernet0/0
C 172.18.22.0/24 is directly connected, Serial0/0
S* 0.0.0.0/0[1/0] via 172.19.22.2



What is the cause of this problem?
A. The FastEthernet interface is disabled.
B. The neighbor relationship table is not updated.
C. A static route is configured incorrectly.
D. The routing table on ********1 is not updated.
E. IP routing is not enabled

Q77. You are a network technician at CiscoSystem, Inc. The router topology for the CiscoSystem network is shown in the following exhibit:



CiscoSystem2 and CiscoSystem3 are configured for RIPv1 and have complete connectivity. CiscoSystem1 was recently added to the network. You want CiscoSystem1 to have full connectivity as well.
What would then be the most appropriate CiscoSystem1 configuration?
A. CiscoSystem1(config)# router rip
CiscoSystem1(config-router)# network 10.0.0.0
CiscoSystem1(config-router)# network 172.16.0.0
CiscoSystem1(config-router)# network 192.168.1.0
B. CiscoSystem1(config)# router rip
CiscoSystem1(config-router)# network 10.0.0.0
CiscoSystem1(config-router)# network 192.168.1.0
C. CiscoSystem1(config)# router rip
CiscoSystem1(config-router)# network 10.0.0.0
CiscoSystem1(config-router)# network 172.16.0.0
D. CiscoSystem1(config)# router rip
CiscoSystem1(config-router)# network 10.0.0.0

Q99. You are a network technician at CiscoSystem, Inc. One of your trainees asked you which parameter must be supplied when initializing the IGRP routing process.
What would your response be?
A. IP address subnet mask
B. Metric weighting
C. Register administrative id
D. Autonomous system number
E. Connected network ID numbers

Q121. Study the Exhibit below carefully:



Popcorn# show ip protocols
Routing Protocol is “rip”
Sending updates every 30 seconds, next due in 13 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is
Incoming update filter list for all interfaces is
Redistribution: rip
Default version control: send version 1, receive any version
Interface Send Recv Triggered RIP Key-chain
Ethernet0 1 12
Ethernet1 1 12
Serial 1 12
Routing for Networks:
222.8.4.0
10.1.1.0
Routing Information Sources:
Gateway Distance Last Update
222.8.4.1 120 00:00:04
Consider the following scenario: You are consoled into the Peanut router and is able to ping Serial0 and Ethernet0 ports of the Popcorn router. However, you cannot ping its Ethernet1 interface. Given the exhibit above and the command output, can you identify the possible causes for this problem? (Select two options.)
A. The Popcorn router is not forwarding RIP updates.
B. The Popcorn router did not include network 192.168.12.0 in its routing configuration.
C. The Ethernet1 interface of the Popcorn router is shutdown.
D. The clockrate is not present in the configuration of one of the routers.
E. The Serial interface of the Popcorn router is not operationable.


Q122. Study the Exhibit below carefully:
RtrA#debug ip rip
Rip protocol debugging is on
RtrA#
1d05h: RIP: sending v1 update to 255.255.255.255 via FastEthernet0/0 (172.16.1.1)
1d05h: RIP: build update entries
1d05h: network 10.0.0.0 metric 1
1d05h: network 192.168.1.0 metric 2
1d05h: RIP: sending v1 update to 255.255.255.255 via Serial0/0 (10.0.8.1)
1d05h: RIP: build update entries
1d05h: network 172.16.0.0 metric 1
RtrA#
1d05h: RIP: received v1 update from 10.0.15.2 on Serial0/0
1d05h: 192.168.1.0 in 1 hops
1d05h: 192.168.0 in 16 hops (inaccessible)
Which of the following statements would be true when one encounters the command output shown in the display? (Select two options.)
A. A ping to 10.0.15.2 will be successful.
B. RtrA has three interfaces that will take part in the RIP process.
C. There are at least two routers participating in the RIP process.
D. A ping to 192.168.168.2 will be positive.


Q146
Study the Exhibit below carefully:



Users on the Holyoke router cannot get access to the intranet server attached to interface E0 of the Chicopee router. After investigating you discover that the routing table of the Holyoke router shows that an entry for the Chicopee E0 network is missing.
Which command, according to the above exhibit, will configure the Holyoke router with a path to the intranet server network?
A. Holyoke(config)# ip host Chicopee 201.73.127.2
B. Holyoke(config)# ip network 202.18.38.0
C. Holyoke(config)# ip network 202.18.18.0 255.255.255.0
D. Holyoke(config)# ip host Chicopee 201.73.127.0 255.255.255.0
E. Holyoke(config)# ip route 202.18.18.0 255.255.255.0 201.73.127.2
F. Holyoke(config)# ip route 201.73.127.2 255.255.255.0 202.18.18.0

Q152. One of your trainees asked you which parameter must be supplied when initializing the IGRP routing process. What is your response?
A. Connected subnet numbers
B. Register administrative subnet masks
C. IP address mask
D. Autonomous system number
E. Metric weights


Q161. Study the Exhibit below carefully:

The company, CiscoSystem, network is running OSPF on the routers as shown in the exhibit above. An ISDN link provides connectivity to the remote sales office.
Which of the following route types should be configured on the Corporate router to connect to the sales office’s remote network while minimizing network overhead on the ISDN link?
A. A RIP route
B. An OSPF route
C. A static route
D. A default route
E. A dynamic route

Q162. Study the Exhibit below carefully:
Cisco_System#show ip protocol
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 4 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Redistribution rip
Default version control: send version 1, receive any version
Interface Send Recv Triggered RIP Key-chain
Serial0/0 1 1 2
Serial0/1 1 1 2
Automatic network summarization is in effect
Maximum path: 4
Routing for Networks:
10.0.0.0
Routing Information Sources:
Gateway Distance Last Update
10.168.11.14 120 00:00:22
Distance: (default is 120)
John#show ip interfaces brief
Interface IP-Address OK? Method Status
FastEthernet0/0 192.168.18.1 YES manual up
Serial0/0 10.168.11.17 YES manual up
FastEthernet0/1 unassigned YES NVRAM administratively down
Serial0/1 192.168.11.21 YES manual up
The exhibit above shows the output from the router. Use it to determine which of the following are correct. (Select two options.)
A. Router John will get routing updates on the Serial0/1 interface.
B. Router John will issue routing updates out the Serial0/0 interface.
C. Router John makes use of a link-state routing protocol.
D. Router John will get routing updates on the Serial0/0 interface.
E. Router John will issue routing updates out the FastEthernet0/0 interface.

Q172 One of your trainees wants to know which of the following statements regarding the command ip route 172.16.3.0 255.255.255.0 192.168.2.4 are true. What can you tell her? (Select two options.)
A. The default administrative distance is used.
B. The command is used to establish a static route.
C. The command is used to configure the routers.
D. The command is used to establish a stub network.
E. The subnet mask for the source address is 255.255.255.0

Q237. You are the network engineer at CiscoSystem. Your CiscoSystem trainee Tess wants to know which parameter must be supplied when you initialize the IGRP routing process.
What should you tell her?
A. The wild card mask
B. The IP address
C. The IP address mask
D. The metric weights
E. The Autonomous System number

Q253. You are the network administrator at CiscoSystem. The RIP routing protocol is being used on the CiscoSystem network. RIP is configured with default settings and equal cost load balancing. The CiscoSystem network has six paths with the same metric and administrative distance for a single destination.
Which of the six paths will RIP use to reach the destination?
A. Only the first two paths that are learned.
B. Four of the paths.
C. All six routes in a routed robin fashion.
D. The oldest two paths in the routing table.
E. The first path learned to the destination network.

Q266. You are the network administrator at CiscoSystem. You issue the show ip route command on a router during routine maintenance. The output from the show ip route command indicates a network that is advertised by both RIP and IGRP as an IGRP route. Your CiscoSystem assistant wants to know why the RIP route to the network is not used in the routing table.
What will your reply be?
A. IGRP has a faster update timer.
B. IGRP has a lower administrative distance.
C. RIP has a higher metric value for that route.
D. The IGRP route has fewer hops.
E. The RIP path has a routing loop.


Q268. You are the network administrator at CiscoSystem. The CiscoSystem network has the address of 192.1.1.0/24 and is using RIP as the routing protocol. A portion of the network is shown in the following exhibit:



You want to configure router Cisco1 for LAN-to-LAN communication with router Cisco2.
Which series of commands should you issue? (Choose three.)
A. Cisco1(config)# interface ethernet 0
Cisco1(config-if)# ip address 192.1.1.129 255.255.255.192
Cisco1(config-if)# no shutdown
B. Cisco1(config)# interface ethernet 0
Cisco1(config-if)# ip address 192.1.1.97 255.255.255.192
Cisco1(config-if)# no shutdown
C. Cisco1(config)# interface serial 0
Cisco1(config-if)# ip address 192.1.1.4 255.255.255.252
Cisco1(config-if)# clock rate 56000
D. Cisco1(config)# interface serial 0
Cisco1(config-if)# ip address 192.1.1.6 255.255.255.252
Cisco1(config-if)# no shutdown
E. Cisco1(config)# router rip
Cisco1(config-router)# network 192.1.1.4
Cisco1(config-router)# network 192.1.1.128
F. Cisco1(config)# router rip
Cisco1(config-router)# version 2
Cisco1(config-router)# network 192.1.1.0













Q269. You are the network administrator at CiscoSystem. A portion of the network is shown in the following exhibit:



You configure a static route to the 10.5.6.0/24 network on router CiscoSystem. You want router CiscoSystem to treat this static route as the most reliable route.
Which command should you use?
A. Cisco(config)# ip route 10.5.6.0 0.0.0.255 fa0/0
B. Cisco (config)# ip route 10.5.6.0 0.0.0.255 10.5.4.6
C. Cisco (config)# ip route 10.5.6.0 255.255.255.0 fa0/0
D. Cisco (config)# ip route 10.5.6.0 255.255.255.0 10.5.4.6
E. Cisco (config)# ip route 10.5.4.6 0.0.0.255 10.5.6.0
F. Cisco (config)# ip route 10.5.4.6 255.255.255.0 10.5.6.0

Q276. You are the network administrator at CiscoSystem. The CiscoSystem network is shown in the following exhibit:



With regard to the routing decision router A will make to reach router E, which of the following statements are true? (Choose three.)
A. Router A will determine that all paths have an equal cost if RIP is the routing protocol.
B. Router A will install only the ADE path in its routing table if RIP is the routing protocol.
C. Router A will determine that path ACE has the lowest cost if IGRP is the routing protocol.
D. Router A will determine that path ADE has the lowest cost if IGRP is the routing protocol.
E. Router A will use the route information learned by IGRP if both RIP and IGRP are configured on router A.
F. Router A will use the route information learned by RIP if both RIP and IGRP are configured on router A.

Q285. You are the network technician at CiscoSystem. Two routers on the CiscoSystem network, Router Cisco1 and Router Cisco2 are configured with RIP only. Router Cisco1 receives a routing update with a higher cost path to a remote network that is already in its routing table.
What will Router Cisco1 do?
A. It will ignore the update and take no further action.
B. It will add the update information to its routing table.
C. It will replace the existing routing table entry with the update information.
D. It will delete the existing routing table and will send out hello packets to rebuild the routing table.


Q335
Your boss at Cisco.com is curios about the extended ping command.
Which of the following statements are true? (Choose all that apply.)
A. The extended ping command is supported from user EXEC mode.
B. The extended ping command is supported from privileged EXEC mode.
C. With the extended ping command you can specify the port to be pinged.
D. With the extended ping command you can specify the timeout.
E. With the extended ping command you can specify the datagram size.

[Thang Tam]

Q2. Which of the following routes will be used to forward data in a situation where a routing table contains static, RIP, and IGRP routes destined to the same network with each set to its default administrative distance?
A. The RIP route
B. The static route
C. The IGRP route
D. All three will load balance.

Q7. You are a network administrator at CiscoSystem. You are troubleshooting a router problem. You issue the show ip route command on one of the routers. The output from the command is shown in the following exhibit:

What does [120/3] represent?
A. 120 is the bandwidth allocation and 3 is the routing process number.
B. 120 is the administrative distance and 3 is the metric for that route.
C. 120 is the value of the update timer and 3 is the number of updates received.
D. 120 is the UDP port for forwarding traffic and 3 is the number of bridges.

Q19. You are a network technician at CiscoSystem. You are troubleshooting a LAN connectivity problem. Which of the following router IOS commands could you use? (Select three options.)
A. show ip route B. winipcfg
C. tracert D. show interfaces
E. traceroute F. ping

Q33. Which of the following statements is true regarding the split horizon rule?
A. Distance vector protocols need fall back routes that are responsible for momentary loops.
B. Networks can only remain fully operational provided all information is sent out all active interfaces.
C. Each AS must keep routing tables converged to avoid dead routes from being advertised.
D. Information about a route should not be sent back in the direction from which the original update came.
E. Only routers can split boundaries (horizons) between concentric networks.

Q39. You are a network administrator at CiscoSystem. The CiscoSystem network has three remote networks are accessed through serial 0/0 interface on the CiscoSystem1 router. The remote networks are: 172.16.10.0, 172.16.20.0, and 172.16.30.0. However, users cannot access 172.16.20.0. You are troubleshooting the problem. You issue the debug ip rip and show ip route commands. The output form the command is shown in the following exhibit:
<some output text is omitted>
CiscoSystem1# debug ip rip
ld00h: RIP:received vl update from 172.16.100.2 on Serial0/0
ld00h: 172.16.10.0 in 1 hops
ld00h: 172.16.20.0 in 1 hops
ld00h: 172.16.30.0 in 1 hops
CiscoSystem1# show ip route
Gateway of last resort is not set
172.16.0.0/24 is subnetted, 8 subnets
C 172.16.150.0 is directly connected, FastEthernet0/0
C 172.16.220.0 is directly connected, Loopback2
C 172.16.210.0 is directly connected, Loopback1
C 172.16.200.0 is directly connected, Loopback0
R 172.16.30.0 [120/1] via 172.16.100.2, 00:00:07, Serial0/0
S 172.16.20.0 [1/0] via 172.16.150.15
R 172.16.10.0 [120/1] via 172.16.100.2, 00:00:07, Serial0/0
C 172.16.100.0 is directly connected, Serial0/0

What is the most likely cause of the problem?
A. 172.16.20.0 is not located in CiscoSystem1’s routing table.
B. There is no gateway of last resort on CiscoSystem1.
C. The static route for 172.16.20.0 is incorrect.
D. The CiscoSystem1 router is not receiving 172.16.20.0 updates

Q41. You are a network technician at CiscoSystem, Inc. You are currently troubleshooting a Cisco router. You issue the show ip route command. The output from the command is displayed in the following exhibit:
CiscoSystem1#show ip route
Codes: C - connected, S - static, I - IGRP, R- RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inner area
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - Candidate default
U - per-user static route
Gateway of last resort is not set
R 192.168.8.0/24 [120/1] via 192.168.2.2, 00:00:10, Serial0
C 192.168.9.0/24 is directly connected, Serial1
R 192.168.10.0/24 [120/7] via 192.168.9.1, 00:00:02, Serial1
R 192.168.11.0/24 [120/7] via 192.168.9.1, 00:00:03, Serial1
C 192.168.1.0/24 is directly connected, Ethernet0
C 192.168.2.0/24 is directly connected, Serial0
R 192.168.3.0/24 [120/1] via 192.168.2.2, 00:00:10, Serial0
R 192.168.4.0/24 [120/15] via 192.168.2.2, 00:00:10, Serial0
R 192.168.5.0/24 [120/15] via 192.168.2.2, 00:00:10, Serial0
R 192.168.6.0/24 [120/15] via 192.168.2.2, 00:00:10, Serial0
R 192.168.7.0/24 [120/1] via 192.168.2.2, 00:00:10, Serial0
Which route will not be entered into the routing table of a neighboring router?
A. R 192.168.11.0/24 [120/7] via 192.168.9.1, 00:00:03, Serial1
B. C 192.168.1.0/24 is directly connected, Ethernet0
C. R 192.168.8.0/24 [120/1] via 192.168.2.2, 00:00:10, Serial0
D. R 192.168.5.0/24 [120/15] via 192.168.2.2, 00:00:10, Serial0

Q49. What could you use to prevent rooting loops in the network when configuring the network using a distance vector routing protocol? (Choose two.)
A. Spanning Tree Protocol
B. Shortest path first tree
C. Link-state advertisements (LSA)
D. Hold-down timers
E. Split horizon
F. VRP

Q50. The following exhibit shows the router topology for the CiscoSystem network.



All routers are running RIP. Which of the following statements describe how the routers exchange their
routing tables? (Choose all that apply.)
A. CiscoSystem4 exchanges with CiscoSystem3.
B. CiscoSystem4 exchanges with CiscoSystem2.
C. CiscoSystem4 exchanges with CiscoSystem1.
D. CiscoSystem1 exchanges with CiscoSystem3.
E. CiscoSystem1 exchanges with CiscoSystem2.
F. CiscoSystem1 exchanges with CiscoSystem4.

Q60. Which of the following statements describes the rule of split horizon?
A. Only routers can split boundaries (horizons) between concentric networks.
B. Each AS must keep routing tables converged to prevent dead routes from being advertised across boundaries.
C. Networks can only remain fully converged if all information is sent out all active interfaces.
D. Information about a route should not be sent back in the direction from which the original update came.
E. Distance vector protocols need fall back routers that are responsible for momentary loops.

Q73. You are a network technician at CiscoSystem, Inc. You received reports that users on the CiscoSystem2 Ethernet site cannot access the CiscoSystem1 network site. You issue the show running-config command.
The output form the command is shown in the following exhibit:

After reviewing the command output, what is the most likely cause of the problem?
A. Link state routing protocol is missing.
B. Incorrectly configured IP addresses
C. IGRP is incorrectly configured.
D. Frame relay is not configured.

Q76 : You are a network technician at ********, Inc. You received a report that users on the 172.17.22.0 network are unable to reach the server located on the 172.31.5.0 network. You connected to router ********1 via the console port, issued the show ip route command, and could ping the server. The network topology and the output from the show ip route is shown in the following exhibit:




Cisco1#show ip route
Codes: C – connected, S – static, I – IGRP, R- RIP, M – mobile, B – BGP D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inner area E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, * - Candidate default U – per-user static route
Gateway of last resort is 172.19.22.2 to network 0.0.0.0
C 172.17..22.0/24 is directly connected, FastEthernet0/0
C 172.18.22.0/24 is directly connected, Serial0/0
S* 0.0.0.0/0[1/0] via 172.19.22.2



What is the cause of this problem?
A. The FastEthernet interface is disabled.
B. The neighbor relationship table is not updated.
C. A static route is configured incorrectly.
D. The routing table on ********1 is not updated.
E. IP routing is not enabled

Q77. You are a network technician at CiscoSystem, Inc. The router topology for the CiscoSystem network is shown in the following exhibit:



CiscoSystem2 and CiscoSystem3 are configured for RIPv1 and have complete connectivity. CiscoSystem1 was recently added to the network. You want CiscoSystem1 to have full connectivity as well.
What would then be the most appropriate CiscoSystem1 configuration?
A. CiscoSystem1(config)# router rip
CiscoSystem1(config-router)# network 10.0.0.0
CiscoSystem1(config-router)# network 172.16.0.0
CiscoSystem1(config-router)# network 192.168.1.0
B. CiscoSystem1(config)# router rip
CiscoSystem1(config-router)# network 10.0.0.0
CiscoSystem1(config-router)# network 192.168.1.0
C. CiscoSystem1(config)# router rip
CiscoSystem1(config-router)# network 10.0.0.0
CiscoSystem1(config-router)# network 172.16.0.0
D. CiscoSystem1(config)# router rip
CiscoSystem1(config-router)# network 10.0.0.0

Q99. You are a network technician at CiscoSystem, Inc. One of your trainees asked you which parameter must be supplied when initializing the IGRP routing process.
What would your response be?
A. IP address subnet mask
B. Metric weighting
C. Register administrative id
D. Autonomous system number
E. Connected network ID numbers

Q121. Study the Exhibit below carefully:



Popcorn# show ip protocols
Routing Protocol is “rip”
Sending updates every 30 seconds, next due in 13 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is
Incoming update filter list for all interfaces is
Redistribution: rip
Default version control: send version 1, receive any version
Interface Send Recv Triggered RIP Key-chain
Ethernet0 1 12
Ethernet1 1 12
Serial 1 12
Routing for Networks:
222.8.4.0
10.1.1.0
Routing Information Sources:
Gateway Distance Last Update
222.8.4.1 120 00:00:04
Consider the following scenario: You are consoled into the Peanut router and is able to ping Serial0 and Ethernet0 ports of the Popcorn router. However, you cannot ping its Ethernet1 interface. Given the exhibit above and the command output, can you identify the possible causes for this problem? (Select two options.)
A. The Popcorn router is not forwarding RIP updates.
B. The Popcorn router did not include network 192.168.12.0 in its routing configuration.
C. The Ethernet1 interface of the Popcorn router is shutdown.
D. The clockrate is not present in the configuration of one of the routers.
E. The Serial interface of the Popcorn router is not operationable.


Q122. Study the Exhibit below carefully:
RtrA#debug ip rip
Rip protocol debugging is on
RtrA#
1d05h: RIP: sending v1 update to 255.255.255.255 via FastEthernet0/0 (172.16.1.1)
1d05h: RIP: build update entries
1d05h: network 10.0.0.0 metric 1
1d05h: network 192.168.1.0 metric 2
1d05h: RIP: sending v1 update to 255.255.255.255 via Serial0/0 (10.0.8.1)
1d05h: RIP: build update entries
1d05h: network 172.16.0.0 metric 1
RtrA#
1d05h: RIP: received v1 update from 10.0.15.2 on Serial0/0
1d05h: 192.168.1.0 in 1 hops
1d05h: 192.168.0 in 16 hops (inaccessible)
Which of the following statements would be true when one encounters the command output shown in the display? (Select two options.)
A. A ping to 10.0.15.2 will be successful.
B. RtrA has three interfaces that will take part in the RIP process.
C. There are at least two routers participating in the RIP process.
D. A ping to 192.168.168.2 will be positive.


Q146
Study the Exhibit below carefully:



Users on the Holyoke router cannot get access to the intranet server attached to interface E0 of the Chicopee router. After investigating you discover that the routing table of the Holyoke router shows that an entry for the Chicopee E0 network is missing.
Which command, according to the above exhibit, will configure the Holyoke router with a path to the intranet server network?
A. Holyoke(config)# ip host Chicopee 201.73.127.2
B. Holyoke(config)# ip network 202.18.38.0
C. Holyoke(config)# ip network 202.18.18.0 255.255.255.0
D. Holyoke(config)# ip host Chicopee 201.73.127.0 255.255.255.0
E. Holyoke(config)# ip route 202.18.18.0 255.255.255.0 201.73.127.2
F. Holyoke(config)# ip route 201.73.127.2 255.255.255.0 202.18.18.0

Q152. One of your trainees asked you which parameter must be supplied when initializing the IGRP routing process. What is your response?
A. Connected subnet numbers
B. Register administrative subnet masks
C. IP address mask
D. Autonomous system number
E. Metric weights


Q161. Study the Exhibit below carefully:

The company, CiscoSystem, network is running OSPF on the routers as shown in the exhibit above. An ISDN link provides connectivity to the remote sales office.
Which of the following route types should be configured on the Corporate router to connect to the sales office’s remote network while minimizing network overhead on the ISDN link?
A. A RIP route
B. An OSPF route
C. A static route
D. A default route
E. A dynamic route

Q162. Study the Exhibit below carefully:
Cisco_System#show ip protocol
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 4 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Redistribution rip
Default version control: send version 1, receive any version
Interface Send Recv Triggered RIP Key-chain
Serial0/0 1 1 2
Serial0/1 1 1 2
Automatic network summarization is in effect
Maximum path: 4
Routing for Networks:
10.0.0.0
Routing Information Sources:
Gateway Distance Last Update
10.168.11.14 120 00:00:22
Distance: (default is 120)
John#show ip interfaces brief
Interface IP-Address OK? Method Status
FastEthernet0/0 192.168.18.1 YES manual up
Serial0/0 10.168.11.17 YES manual up
FastEthernet0/1 unassigned YES NVRAM administratively down
Serial0/1 192.168.11.21 YES manual up
The exhibit above shows the output from the router. Use it to determine which of the following are correct. (Select two options.)
A. Router John will get routing updates on the Serial0/1 interface.
B. Router John will issue routing updates out the Serial0/0 interface.
C. Router John makes use of a link-state routing protocol.
D. Router John will get routing updates on the Serial0/0 interface.
E. Router John will issue routing updates out the FastEthernet0/0 interface.

Q172 One of your trainees wants to know which of the following statements regarding the command ip route 172.16.3.0 255.255.255.0 192.168.2.4 are true. What can you tell her? (Select two options.)
A. The default administrative distance is used.
B. The command is used to establish a static route.
C. The command is used to configure the routers.
D. The command is used to establish a stub network.
E. The subnet mask for the source address is 255.255.255.0

Q237. You are the network engineer at CiscoSystem. Your CiscoSystem trainee Tess wants to know which parameter must be supplied when you initialize the IGRP routing process.
What should you tell her?
A. The wild card mask
B. The IP address
C. The IP address mask
D. The metric weights
E. The Autonomous System number

Q253. You are the network administrator at CiscoSystem. The RIP routing protocol is being used on the CiscoSystem network. RIP is configured with default settings and equal cost load balancing. The CiscoSystem network has six paths with the same metric and administrative distance for a single destination.
Which of the six paths will RIP use to reach the destination?
A. Only the first two paths that are learned.
B. Four of the paths.
C. All six routes in a routed robin fashion.
D. The oldest two paths in the routing table.
E. The first path learned to the destination network.

Q266. You are the network administrator at CiscoSystem. You issue the show ip route command on a router during routine maintenance. The output from the show ip route command indicates a network that is advertised by both RIP and IGRP as an IGRP route. Your CiscoSystem assistant wants to know why the RIP route to the network is not used in the routing table.
What will your reply be?
A. IGRP has a faster update timer.
B. IGRP has a lower administrative distance.
C. RIP has a higher metric value for that route.
D. The IGRP route has fewer hops.
E. The RIP path has a routing loop.


Q268. You are the network administrator at CiscoSystem. The CiscoSystem network has the address of 192.1.1.0/24 and is using RIP as the routing protocol. A portion of the network is shown in the following exhibit:



You want to configure router Cisco1 for LAN-to-LAN communication with router Cisco2.
Which series of commands should you issue? (Choose three.)
A. Cisco1(config)# interface ethernet 0
Cisco1(config-if)# ip address 192.1.1.129 255.255.255.192
Cisco1(config-if)# no shutdown
B. Cisco1(config)# interface ethernet 0
Cisco1(config-if)# ip address 192.1.1.97 255.255.255.192
Cisco1(config-if)# no shutdown
C. Cisco1(config)# interface serial 0
Cisco1(config-if)# ip address 192.1.1.4 255.255.255.252
Cisco1(config-if)# clock rate 56000
D. Cisco1(config)# interface serial 0
Cisco1(config-if)# ip address 192.1.1.6 255.255.255.252
Cisco1(config-if)# no shutdown
E. Cisco1(config)# router rip
Cisco1(config-router)# network 192.1.1.4
Cisco1(config-router)# network 192.1.1.128
F. Cisco1(config)# router rip
Cisco1(config-router)# version 2
Cisco1(config-router)# network 192.1.1.0













Q269. You are the network administrator at CiscoSystem. A portion of the network is shown in the following exhibit:



You configure a static route to the 10.5.6.0/24 network on router CiscoSystem. You want router CiscoSystem to treat this static route as the most reliable route.
Which command should you use?
A. Cisco(config)# ip route 10.5.6.0 0.0.0.255 fa0/0
B. Cisco (config)# ip route 10.5.6.0 0.0.0.255 10.5.4.6
C. Cisco (config)# ip route 10.5.6.0 255.255.255.0 fa0/0
D. Cisco (config)# ip route 10.5.6.0 255.255.255.0 10.5.4.6
E. Cisco (config)# ip route 10.5.4.6 0.0.0.255 10.5.6.0
F. Cisco (config)# ip route 10.5.4.6 255.255.255.0 10.5.6.0

Q276. You are the network administrator at CiscoSystem. The CiscoSystem network is shown in the following exhibit:



With regard to the routing decision router A will make to reach router E, which of the following statements are true? (Choose three.)
A. Router A will determine that all paths have an equal cost if RIP is the routing protocol.
B. Router A will install only the ADE path in its routing table if RIP is the routing protocol.
C. Router A will determine that path ACE has the lowest cost if IGRP is the routing protocol.
D. Router A will determine that path ADE has the lowest cost if IGRP is the routing protocol.
E. Router A will use the route information learned by IGRP if both RIP and IGRP are configured on router A.
F. Router A will use the route information learned by RIP if both RIP and IGRP are configured on router A.

Q285. You are the network technician at CiscoSystem. Two routers on the CiscoSystem network, Router Cisco1 and Router Cisco2 are configured with RIP only. Router Cisco1 receives a routing update with a higher cost path to a remote network that is already in its routing table.
What will Router Cisco1 do?
A. It will ignore the update and take no further action.
B. It will add the update information to its routing table.
C. It will replace the existing routing table entry with the update information.
D. It will delete the existing routing table and will send out hello packets to rebuild the routing table.


Q335
Your boss at Cisco.com is curios about the extended ping command.
Which of the following statements are true? (Choose all that apply.)
A. The extended ping command is supported from user EXEC mode.
B. The extended ping command is supported from privileged EXEC mode.
C. With the extended ping command you can specify the port to be pinged.
D. With the extended ping command you can specify the timeout.
E. With the extended ping command you can specify the datagram size.

[Thang Tam]

Q63. You are a network technician at CiscoSystem, Inc. You are troubleshooting a connectivity problem. You issue the ping command during a router console session. Your trainee wants to know what the ping command use to test connectivity between the two devices. What would your reply be?
A. ICMP echo request
B. Information interrupt request
C. Timestamp reply
D. Source quench

Q182. Which of the following are the routing protocols that are capable of supporting a network that uses VLSM and route summarization? (Select three options.)
A. IGRP
B. EIGRP
C. RIP v1
D. RIP v2
E. OSPF
F. VTP
G. LSA

Q196. What does the concept route aggregate mean when one talks about using variable subnet masking?
A. Deleting unusable addresses through the creation of many subnets.
B. Combining routes to multiple networks into one supernet.
C. Reclaiming unused space by means of changing the subnet size.
D. Calculating the available host addresses in the AS.
















Q213. Study the Exhibit below carefully:

Which of the following is the correct IP address configuration for HostA?
A. IP 192.168.100.31 255.255.255.240 default-gateway 192.168.100.18
B. IP 192.168.100.30 255.255.255.240 default-gateway 172.16.1.1
C. IP 192.168.100.20 255.255.255.240 default-gateway 192.168.100.17
D. IP 192.168.100.21 255.255.255.248 default-gateway 192.168.100.17
E. IP 192.168.100.19 255.255.255.248 default-gateway 172.16.1.1

Q236. You are the network technician at CiscoSystem. You tell your newly appointed CiscoSystem trainee that discontiguous networks in the IP addressing scheme can create problems when a routing protocol tries to identify the next hop. Your trainee now wants to know which routing protocols can be used to minimize the effects of these problems
What will your reply be? (Choose all that apply)

A. IGRP
B. ICMP
C. OSPF
D. RIP v1
E. RIP v2
F. EIGRP





Q254. You are the network administrator at CiscoSystem. You want to configure a default route to any destination network not found in the routing table on router TK1.
Which of the following commands can you issue?
A. TK1(config)# ip default-route 0.0.0.0 255.255.255.255 s0
B. TK1(config)# ip route 0.0.0.0 255.255.255.255 s0
C. TK1(config)# ip default-route 0.0.0.0 s0
D. TK1(config)# ip route 0.0.0.0 0.0.0.0 s0
E. TK1(config)# ip route any any e0

Q265. With regard to classless routing protocols, which of the following statements are true? (Choose two.)
A. Discontiguous subnets are not allowed.
B. Variable length subnet masks are allowed.
C. RIP v1 is a classless routing protocol.
D. IGRP supports classless routing within the same autonomous system.
E. RIP v2 supports classless routing.

Q293. You are the network administrator at CiscoSystem. The CiscoSystem network uses RIP as its routing protocol. A portion of the CiscoSystem network is shown in the following exhibit:


You want to create a gateway of last resort.
What command should you issue?
A. ********1(config)# ip route 172.16.4.2 0.0.0.0 0.0.0.0
B. ********1(config)# ip route 0.0.0.0 0.0.0.0 S1
C. ********1(config)# ip route 172.16.4.1 0.0.0.0 0.0.0.0
D. ********1(config)# ip route S0 0.0.0.0 0.0.0.0
E. ********1(config)# ip route 0.0.0.0 0.0.0.0 172.16.4.2


Q302
Your boss at Cisco.com asks you which routing protocols that supports VLSM.
What should you tell her? (Select three)
A. IP
B. RIPv1
C. EIGRP
D. OSPF
E. IGRP
F. RIPv2

Q303
Your boss at Cisco.com asks you which routing protocols that supports VLSM.
What should you tell her? (Select three)
A. RIPv1
B. IGRP
C. EIGRP
D. OSPF
E. IS-IS
F. CDPv2

Q305
You work as a network consultant. You are required to design a Cisco network for Cisco.com, a large company. Cisco has the following requirements on the network:
• minimal bandwidth for routing updates should be used
• quick converging
• support VLSM, CIDR, IP, and IPX.
What routing protocol should you suggest?
A. RIPv1
B. RIPv2
C. IGRP
D. OSPF
E. EIGRP

[rollroll]

Q63. You are a network technician at CiscoSystem, Inc. You are troubleshooting a connectivity problem. You issue the ping command during a router console session. Your trainee wants to know what the ping command use to test connectivity between the two devices. What would your reply be?
A. ICMP echo request
B. Information interrupt request
C. Timestamp reply
D. Source quench

Q182. Which of the following are the routing protocols that are capable of supporting a network that uses VLSM and route summarization? (Select three options.)
A. IGRP
B. EIGRP
C. RIP v1
D. RIP v2
E. OSPF
F. VTP
G. LSA

Q196. What does the concept route aggregate mean when one talks about using variable subnet masking?
A. Deleting unusable addresses through the creation of many subnets.
B. Combining routes to multiple networks into one supernet. not sure
C. Reclaiming unused space by means of changing the subnet size.
D. Calculating the available host addresses in the AS.

Q236. You are the network technician at CiscoSystem. You tell your newly appointed CiscoSystem trainee that discontiguous networks in the IP addressing scheme can create problems when a routing protocol tries to identify the next hop. Your trainee now wants to know which routing protocols can be used to minimize the effects of these problems
What will your reply be? (Choose all that apply)

A. IGRP
B. ICMP
C. OSPF
D. RIP v1
E. RIP v2
F. EIGRP


Q254. You are the network administrator at CiscoSystem. You want to configure a default route to any destination network not found in the routing table on router TK1.
Which of the following commands can you issue?
A. TK1(config)# ip default-route 0.0.0.0 255.255.255.255 s0
B. TK1(config)# ip route 0.0.0.0 255.255.255.255 s0
C. TK1(config)# ip default-route 0.0.0.0 s0
D. TK1(config)# ip route 0.0.0.0 0.0.0.0 s0
E. TK1(config)# ip route any any e0

Q265. With regard to classless routing protocols, which of the following statements are true? (Choose two.)
A. Discontiguous subnets are not allowed.
B. Variable length subnet masks are allowed.
C. RIP v1 is a classless routing protocol.
D. IGRP supports classless routing within the same autonomous system.
E. RIP v2 supports classless routing.

Q302
Your boss at Cisco.com asks you which routing protocols that supports VLSM.
What should you tell her? (Select three)
A. IP
B. RIPv1
C. EIGRP
D. OSPF
E. IGRP
F. RIPv2

Q303
Your boss at Cisco.com asks you which routing protocols that supports VLSM.
What should you tell her? (Select three)
A. RIPv1
B. IGRP
C. EIGRP
D. OSPF
E. IS-IS
F. CDPv2

Q305
You work as a network consultant. You are required to design a Cisco network for Cisco.com, a large company. Cisco has the following requirements on the network:
• minimal bandwidth for routing updates should be used
• quick converging
• support VLSM, CIDR, IP, and IPX.
What routing protocol should you suggest?
A. RIPv1
B. RIPv2
C. IGRP
D. OSPF
E. EIGRP

[rosekiller]

31. New switches have been purchased for a network upgrade. The objective for the network design emphasizes efficient, error-free transport instead of fast transport. Which switching mode should be configured on the new switches to provide error-free transport to the network?

A. cut-through
B. fragment-free
C. frame-filtering
D. store-and-forward
E. 802.1q forwarding
F. VTP transparent mode

Ans: D, chưa dám chắc lắm, xin anh Minh confirm.

Trong các cơ chế switch, kiểu store-and-forward là đảm bảo các lỗi truyền frame ít xảy ra nhất. Do đó bạn chọn D là một đáp án chính xác.

Thân,

em đồng ý là store and forwarrd đảm bảo ít lỗi khi truyền frame, nhưng giải pháp này lại không đảm bảo tính hiệu quả Effective (truyền nhanh, ít lỗi) -> theo em chuẩn hơn là giải pháp Fragment-Free, tức đáp án B!

[rosekiller]

68. You are working as a network technician at Contoso. You are required to troubleshooting the WAN link between the Contoso main office at Boston and the Contoso remote office at Rio De Janeiro. A Cisco router that was providing Frame Relay connectivity at the Rio de Janeiro site as replaced with a different vendor's frame relay router. Connectivity is now down between the Boston and Rio De Janeiro site.
What is the most likely cause of the problem?

A. Mismatched LMI types.
B. Incorrect DLCI.
C. Mismatched encapsulation types.
D. Incorrect IP address mapping.

Câu A . Cisco LMI dùng DLCI 1023 còn ITU và ANSI dùng DLCI 0.

Hi

Do site ở Rio thay thế bằng một router frame relay của một vendor khác nên khả năng vấn đề lớn nhất nằm ở vấn đề LMI mismatch.

Chúc vui

Theo tôi thì đáp án phải là C, encapsulation phải là ietf, not cisco device!

[nqminh79]

Mình đồng ý với RoseKiller là encap ietf (vì LMI type đã được autosensed và chỉ có ý nghĩa Local). Chắc rosekiller sắp thi cc fải ko, me too. ******** có khá nhiều câu sai, kể cả v40 , họ làm thế là có ý của họ rồi.

[rosekiller]

Anh Minh và các anh mod tổng kết lại giùm bọn em cái, một đống các câu hỏi và thắc mắc, đọc xong thấy...choáng hết cả đầu, chả biết tin vào đáp án nào nữa! hixx, giúp đi các anh....

[OneLove]

QUESTION NO: 151
Study the Exhibit below carefully:
Two switches named London and Madrid has been configured to use VTP. But they are not sharing VTP
messages. Referring to the command output in the exhibit above, why is this so?


A. VTP V2 mode is not in operation.
B. VTP pruning mode is disabled.
C. The VTP domain name is configured incorrectly.
D. The VTP operating mode is not configured.
E. The VTP version is configured incorrectly.

Em kg cho được hình vào, hik các bác thông cảm , bác nào có ******** là biết ngay câu nè.
******** đưa ra đáp án là C. Cho em hỏi thêm là cái pruning tác dụng là gi ạ

[OneLove]

thêm mấy câu nữa các bác ơi

QUESTION NO: 240
You are a technician at ********. Your newly appointed ******** trainee wants to know what is specific
for a global command.
What should you tell her?
A. A command that is available in every release of IOS.
B. A command that can be entered in any configuration mode.
C. A command that supports all protocols.
D. A command that is implemented in all IOS versions.
E. A command that is set once and affects the entire router.

******** : E???
em nghĩ là B

QUESTION NO: 244
You are the network administrator at ********. From your workstation you telnet to a router VTY line.
You perform a number of configurations on the router. You now want to terminate the telnet connection.
What command must you issue to terminate the Telnet connection?
A. close
B. disable
C. disconnect
D. suspend
E. exit

C hay E???

[rosekiller]

thêm mấy câu nữa các bác ơi

QUESTION NO: 240
You are a technician at ********. Your newly appointed ******** trainee wants to know what is specific
for a global command.
What should you tell her?
A. A command that is available in every release of IOS.
B. A command that can be entered in any configuration mode.
C. A command that supports all protocols.
D. A command that is implemented in all IOS versions.
E. A command that is set once and affects the entire router.

******** : E???
em nghĩ là B

QUESTION NO: 244
You are the network administrator at ********. From your workstation you telnet to a router VTY line.
You perform a number of configurations on the router. You now want to terminate the telnet connection.
What command must you issue to terminate the Telnet connection?
A. close
B. disable
C. disconnect
D. suspend
E. exit

C hay E???

Hi all,
Q240. Đáp án chuẩn là E
Q 244. Làm lab thật biết ngay, lệnh disconnect vô tác dụng, dù có, nó nói # no current connection! Dùng lệnh EXIT là đúng nhất!

[OneLove]

QUESTION NO: 287
You are the network administrator at ********. You are troubleshooting an EIGRP problem on Router
TK1. You want to check the IP addresses as well as the retransmit interval and the queue counts for the
devices which have established an adjacency with Router TK1.
What command should you issue?
A. TK1#show ip eigrp adjacency
B. TK1#show ip eigrp topology
C. TK1#show ip eigrp interfaces
D. TK1#show ip eigrp neigbors

TK: D???
câu này là đáp án nào các bác??? em chạy thử Boson mà kg thấy :(

[changchancuucodon]

dùng lệnh show ip eigrp neighbor để xem thông tin về re-transmission và các thông tin về địa chỉ IP.

Chào bạn

[rosekiller]

Anh Minh và các anh mod tổng kết lại giùm bọn em cái, một đống các câu hỏi và thắc mắc, đọc xong thấy...choáng hết cả đầu, chả biết tin vào đáp án nào nữa! hixx, giúp đi các anh....

Không thấy mod nào lên tiếng là sao?

[trung tam kn]

cụ thể là rosekiller choáng với câu hỏi nào?

rosekiller phải nên tự tìm lấy 1 đáp án cho riêng mình sau khi đọc hàng ngàn thảo luận trong thread này chứ?

[rosekiller]

TTKT, tất nhiên bản thân mỗi người phải tự tìm cho mình một đáp án, nhưng trong vấn đề thảo luận, có sự phân tích hợp lý chí tình của nhiều cao nhân trong nghề, trải nghiệm rất nhiều rồi thì dĩ nhiên sẽ tốt hơn!

[rosekiller]

hi

Như vậy là g_dragon và admin đã thống nhất với nhau hai chọn lựa:

F/ Cần phải gán IP address
C/ Cần chỉ ra lọai tổng đài isdn switch-type

Sự khác bịệt nằm ở

nên chọn A 'encapsulation ppp
hay nên chọn E ' dialer-group 1'

Do đó, nên quay lại ngữ cảnh của câu hỏi:

"QUESTION NO: 18
You are a network technician at ********. The ******** network is illustrated in the following exhibit.

Router(BRI)-------------------(ISDN Cloud)--------------------(BRI)Router

Study it carefully:
Note: SPIDs are not required for this switch.
Which of the following command will you use to bring up the ISDN link? (Select three options.)
A. Router(config-if)# encapsulation ppp
B. Router(config)# dialer-list 1 protocol ip allow
C. Router(config)# isdn switch-type type
D. Router(config)# dialer map ip address name connection number
E. Router(config-if)# dialer-group 1
F. Router(config-if)# ip address address subnet mask "

Từ khóa cho việc chọn lựa là "to bring up the ISDN link?".

Và như g_dragon từng thực tập, lệnh dialer_group dùng để apply một interesting traffic vào interface dialer. Lệnh này mang tính chất sống còn để một interface dialer có thể BRING UP the ISDN link.

Trong khi đó, ISDN vẫn có thể chạy mà không cần 'encapsulation ppp'.

Cám ơn,

Hi admin & all,
tại sao lại ko cần encapsulation ppp? đây là một iêu cầu cần phải có để một isdn link hoạt động -> theo tôi đáp án chính xác là A, C, F! đó là đáp án chuẩn nhất!

[robedan]

hi róiekill

có thể dùng hdlc trên các giao tiếp isdn. Không nhất thiết phải dùng ppp đâu !

[iPMAC(Labvn)]

robedan nói đúng, có thể cấu hình HDLC hoặc PPP cho ISDN. Tuy nhiên đáp án câu này chính xác vẫn là A,C,F

3 bước bắt buộc để bring up 1 đường ISDN là
- Xác định ISDN switch type
- Xác định encasulation cho lớp 2 (đối với kênh B)
- Xác định địa chỉ lớp 3.

Ngoài ra các bạn chú ý các cấu hình DDR và kể cả dialer-map chỉ là optional

[nqminh79]

Mình có ý kiến thế này ko biết có đúng ko, mong các bạn góp ý:
Mình ko thấy đề bài nói đến chuyện dùng DDR. Nếu dùng DDR thì 3 câu lệnh có lẽ chưa đủ để chạy, nếu phải chọn thì trong hoàn cảnh này cũng chưa biết nên bỏ câu lệnh nào. Nếu ko dùng DDR thì theo như Sybex viết:
If you are not using DDR (discussed next), the three basic commands that Cisco says you
need to configure when bringing up an ISDN link are:
RouterA(config)#isdn switch-type basic-ni
RouterA(config)#isdn dialer map ip address name name connection number
RouterA(config-if)#ip address address mask
(Sybex v4, page 509)
Có thể câu hỏi này lấy cảm hứng từ đây, cho dù đề bài có vẻ ko được rõ ràng chính xác lắm.
Ở đây mình thấy có điều hơi lạ là "isdn dialer map...." trong global config mode chứ ko phải "dialer map...." trong interface config mode. Phải chăng đây chính là Hot Spot của vấn đề? Chỗ này thì mình không hiểu lắm, xin các bạn giải thích giùm.
Thanks for reading.

[rosekiller]

hehe, cậu giống tôi rồi, nqminh79! But SYBEX!

Trong truòng hợp này, vì ko yêu cầu DDR -> ko cần dial group, dial llist! vả lại, để thiết lập isdn cần sure encapsulation ở 2 đầu, và ppp đảm bảo trường hợp thiết bị 2 đầu thuộc 2 vendorr khác nhau!

[nqminh79]

:lol: Killer bao giờ thi CC thế, ur yahoo nick là gì vậy and where are u learing or leasing Lab? Mình thuê Lab ở Vnexperts
Có câu hỏi nào hay post típ nhe
See u then. Bye

[p_11]

18
You are a network technician at ********. The ******** network is illustrated in the following exhibit. Study it carefully:h1



Note: SPIDs are not required for this switch.
Which of the following command will you use to bring up the ISDN link? (Select three options.)
A. Router(config-if)# encapsulation ppp
B. Router(config)# dialer-list 1 protocol ip allow
C. Router(config)# isdn switch-type type
D. Router(config)# dialer map ip address name connection number
E. Router(config-if)# dialer-group 1
F. Router(config-if)# ip address address subnet mask

25
You are a network technician at ********. Due to rapid expansion, ******** is leaning towards scalable
WAN technology. Immediate plans for the company include an additional 7 regional offices with all sites
requiring continuous connectivity, but the current head office has no free ports available.
Which of the following WAN technologies will meet the requirements?
A. Frame Relay
B. Broadband cable
C. ISDN-BRI
D. ADSL
E. Dedicated PPP/HDLC links
F. ISDN
62
Which of the following features are PPP characteristics? (Choose 2.)
A. Encapsulates several different types of routing protocols.
B. Supports only IP.
C. Can be used over analog circuits.
D. Maps Layer addresses.
E. Corrects errors.
69
Which of the following options can be negotiated using LCP during the PPP link establishment? (Select
three options.)
A. Q.931
B. IPCP
C. multilink
D. CHAP
E. callback

70
h2
Match the ISDN term on the right to the appropriate description on the left. Please note: Not all options
on the left apply.
79 h3
The ******** network is shown in the following exhibit:

What is the function of the Frame Relay DLCI with regard to ********1?
A. Defines the signaling standard between ********1 and ********2.
B. Classifies the encapsulation used between ********1 and ********2.
C. Identifies the circuit between ********1 and the frame switch.
D. Classifies the circuit between ********1 and ********2.
E. Defines the signaling standard between ********1 and the frame switch.

[trung tam kn]

25.

trong thiết kế các giải pháp WAN, Frame Relay thường được nhắc đến do đặc tính rẻ tiền, phù hợp với mô hình hub-and-spoke.

FR còn có một ưu điểm khác nữa là không phải trang bị thêm cổng vật lý cho router khi có thêm các site khác kết nối vào. Điều này là do FR cho phép người quản trị mạng tạo ra các sub-interface trên routers.

Thân ,

[p_11]

câu 18: mình thấy cả a, c,e, f đều đúng , tại sao câu a sai?

câu 62 : chỉ biết mỗi câu e , còn câu nào nửa

câu 69 : chỉ c, d thôi , câu nào nữa vậy?

câu 70: Nt1 cho vào connect the U reference...
TE2 cho vào a serial interface on router
TE1 cho vào an ISDN data link....
câu 79 : bó tay

cho một vài ý kiến đi các bạn ơi

[p_11]

180
You need to establish a telnet session to verify the status of a physical connection. You then issue the
debug frame-relay lmi command. However, after 40 seconds, you do not get any output resulting from
the debug command.
Why are no messages displayed?
A. The IP addresses are configured incorrectly.
B. Frame Relay LMI messages not displayed in real time.
C. The administrator must issue the enable frame-relay lmi debug command.
D. The administrator must issue the terminal monitor command.
E. Debug messages can only be received once through the console port.
F. The administrator must issue the show frame-relay lmi vty 0 4 command-

210
How would you configure a router in a Frame Relay network to prevent issues such as split horizons
hampering routing updates?
A. Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the subinterface.
B. Configure many sub-interfaces on the same subnet.
C. Configure each Frame Relay circuit as a point-to-point line.
D. Configure only one sub-interface to establish multiple PVC connections.
E. Configure a single sub-interface connect to multiple remote router interfaces.

233
You are a technician at ********. You have encapsulated an ISDN link on the ******** network with
PPP. Your newly appointed ******** trainee wants to know why you did not use HDLC to encapsulate
the ISDN link.
What will your reply be? (Choose 2.)
A. PPP is easier to configure and maintain than HDLC.
B. Different equipment vendors consistently implement PPP.
C. PPP can be routed across public facilities, while HDLC is not.
D. PPP uses authentication to prevent unauthorized access to the ISDN circuit.
E. On circuit-switched ISDN links PPP is faster and more efficient than HDLC.

248
As what type of physical network is a default Frame Relay WAN classified?
A. point-to-point
B. broadcast multi-access
C. nonbroadcast multipoint
D. nonbroadcast multi-access
E. broadcast point-to-multipoint

249
You are the network administrator at ********. ******** has its headquarters in New York, and
regional offices in Boston, Buffalo, Cleveland, Pittsburgh and Baltimore. You want to connect the
regional offices to headquarters. You are evaluating WAN technologies that could accomplish this. You
want each regional office to be connected to the corporate headquarters in a hub and spoke arrangement
using a packet-switched technology.
Which of the following WAN technologies should you use?
A. ISDN
B. Wireless
C. Frame Relay
D. T1 leased line
E. Point to point leased line

288
You are the CEO at ********. The network administrator has left the company unexpectedly. ********
is experiencing problems with its Internet connection. You retrieve the following interconnection
diagram from the equipment room.
hình 1
Based on the diagram, what type of Internet connection could ******** have? (Choose two)
A. DSL
B. Frame Relay
C. ISDN
D. Dedicated T1
E. Wireless
F. POTS

[kimlong]

cau 180

Phải dùng terminal monitor để có thễ thấy debug qua ngõ telnet.

[p_11]

câu 18: cả a,c, e, f đều đúng. nhưng câu a không cần thiết. ok

[p_11]

210 c
233 bd
249c
288 dùng phương pháp lọai suy , ta thấy a, b, e , f sai suy ra còn lại đúng. bạn có cách nào không giải thích dùm đi

248 ?

[nhanh]

Câu 288 làm sao câu b lại sai được

Những kiểu kết nối có sử dụng CSU/DSU là Frame Relay và Dedicated Line, nên đáp án phải là B và D

Câu 248 là D. Mặc định của FR là NBMA(NonBroadcast MultiAccess)

[p_11]

cám ơn nhanh nhiều lắm, mấy câu kia thì ok chứ

[p_11]

có một bài tập thế này muốn hỏi các bạn:

switch1 --------------------------switch2

-switch1 có địa chỉ ip 192.168.2.89 255.255.255.224, hai pc1, pc2 nối vào switch1
- Bây giờ ta nối swich2 vào switch 1, swich 2 cũng có 2 pc nối vào. tất cả 2 switch trên đều có default vlan 1.
yêu cầu:
1. cấu hình địa chỉ ip cho các host của swithc 2
2. cấu hình default gateway cho switch.
3. Nếu khi thi trên cisco lab, làm xong rồi ta có cần phải dùng copy run start

Lời giải thế này đúng hay sai vậy
1.
conf t
interface vlan 1
ip add 192.168.2.90 255.255.255.224
no shut
2.
conf t
ip default gateway 192.168.2.91
3
copy run start

[p_11]

278. Your newly appointed ******** trainee wants to know at what layers of the OSI reference model a WANs operates. What will your reply be? (Choose two.)
A. Application layer
B. Presentation layer
C. Session layer
D. Transport layer
E. Network layer
F. Data link layer
G. Physical layer

******* chọn e, f. vì sao chọn 2 câu này có phải :
chọn câu e vì địa chỉ ip
chọn câu f vì authentication
mình thấy câu d cũng có lý lắm mà

[p_11]

333. With regard to Positive Acknowledgment and Retransmission (PAR), which of the following are true? (Choose 3.)
A. The source device will only retransmit lost packets on the request of the destination device.
B. The source device starts a timer when it sends a segment and retransmits if an acknowledgment is not received before the timer expires.
C. The destination device acknowledges receipt of a segment by sending a packet with a new sequence number and the ACK bit sent.
D. The destination device acknowledges receipt of a segment by sending a packet that indicates the next sequence number it expects.
E. If the destination device does not receive a segment, all segments are retransmitted.
F. The source device keeps a record of all segments sent and expects and acknowledgment of each.


335. Your boss at ********.com is curios about the extended ping command.
Which of the following statements are true? (Choose 3.)
A. The extended ping command is supported from user EXEC mode.
B. The extended ping command is supported from privileged EXEC mode.
C. With the extended ping command you can specify the port to be pinged.
D. With the extended ping command you can specify the timeout.
E. With the extended ping command you can specify the datagram size.

lệnh ping mở rộng là thế nào vậy?

[dangquangminh]

có một bài tập thế này muốn hỏi các bạn:

switch1 --------------------------switch2

-switch1 có địa chỉ ip 192.168.2.89 255.255.255.224, hai pc1, pc2 nối vào switch1
- Bây giờ ta nối swich2 vào switch 1, swich 2 cũng có 2 pc nối vào. tất cả 2 switch trên đều có default vlan 1.
yêu cầu:
1. cấu hình địa chỉ ip cho các host của swithc 2
2. cấu hình default gateway cho switch.
3. Nếu khi thi trên cisco lab, làm xong rồi ta có cần phải dùng copy run start

Lời giải thế này đúng hay sai vậy
1.
conf t
interface vlan 1
ip add 192.168.2.90 255.255.255.224
no shut
2.
conf t
ip default gateway 192.168.2.91
3
copy run start

Hi

Em cấu hình default-gateway của switch 2 là địa chỉ của interface vlan 1, 192.168.2.89.

Lúc đi thi cũng nên dùng lệnh copy run start để lưu cấu hình lại. Nếu sau đó show start-up thấy cấu hình startup-config không được lưu thì cứ bình tĩnh kiểm tra lại running-config một lần nữa. Hiện nay có một số bài SIM trong kỳ thi CCNA không có tác dụng đối với lệnh copy running-config startup-config.

Thân chào

[p_11]

Em cấu hình default-gateway của switch 2 là địa chỉ của interface vlan 1, 192.168.2.89.

Em không hiểu vấn đề này , anh có thể nói vì sao phải cấu hình như vậy không?

Giả sử bây giờ mình muốn cấu hình địa chỉ ip cho cho switch 2 , thì có phải giống với địa chỉ ip của switch 1 không?

[p_11]

333. With regard to Positive Acknowledgment and Retransmission (PAR), which of the following are true? (Choose 3.)
A. The source device will only retransmit lost packets on the request of the destination device.
B. The source device starts a timer when it sends a segment and retransmits if an acknowledgment is not received before the timer expires.
C. The destination device acknowledges receipt of a segment by sending a packet with a new sequence number and the ACK bit sent.
D. The destination device acknowledges receipt of a segment by sending a packet that indicates the next sequence number it expects.
E. If the destination device does not receive a segment, all segments are retransmitted.
F. The source device keeps a record of all segments sent and expects and acknowledgment of each.


335. Your boss at ********.com is curios about the extended ping command.
Which of the following statements are true? (Choose 3.)
A. The extended ping command is supported from user EXEC mode.
B. The extended ping command is supported from privileged EXEC mode.
C. With the extended ping command you can specify the port to be pinged.
D. With the extended ping command you can specify the timeout.
E. With the extended ping command you can specify the datagram size.

lệnh ping mở rộng là thế nào vậy?

[nhanh]

Câu 335.Đáp án là B,E,E

Lệnh ping mở rộng chỉ được thực hiện trong mode priviledge, và có thể xác định giá trị TTL, cỡ datagram, có phân mảnh gói tin hay không(bằng cách đặt bit DF)...

[duyvk]

câu này hỏi về ISDN (xem hình bên dưới). Theo Sybex CCNA 4.0 trang 509 thì đáp án sẽ là C,D,F?

[p_11]

mình nghĩ câu trả lời ở trên sai câu d : Nó phải ở chế độ config - if

câu trả lời c, e, f

[mybb]

Không, mình nghĩ là b, c, e mới đúng chứ. Phải có dialer list thì mình mới có dialer group chứ.

[nghiaquinhon]

QUESTION NO: 1
Which of the following factors determines the OSPF router ID when configuring a router with both physical and logical interfaces?
A. The lowest network number of any interface.
B. The highest network number of any interface.
C. The highest IP address of any logical interface.
D. The middle IP address of any logical interface.
E. The lowest IP address of any physical interface.
F. The highest IP address of any physical interface.
G. The lowest IP address of any logical interface


Câu này trong ******* chọn câu F.
Nhưng Em nghĩ câu B cũng Đúng? Anh minh giải thích dùm nhen.
Xin cảm ơn !

[infin]

chọn F đi bạn. Diển đàn vnpro thảo luận câu hỏi này hoài.

[dungnd44c]

Theo như tôi thì OSPF chọn địa chỉ cổng Loopback lớn nhất
Trong ******** có 1 số câu trả lời sai đó


QUESTION NO: 1
Which of the following factors determines the OSPF router ID when configuring a router with both physical and logical interfaces?
A. The lowest network number of any interface.
B. The highest network number of any interface.
C. The highest IP address of any logical interface.
D. The middle IP address of any logical interface.
E. The lowest IP address of any physical interface.
F. The highest IP address of any physical interface.
G. The lowest IP address of any logical interface


Câu này trong ******* chọn câu F.
Nhưng Em nghĩ câu B cũng Đúng? Anh minh giải thích dùm nhen.
Xin cảm ơn !

[diepsuzu]

hi all,
Co ai giup minh ve cau hoi 54 and 55 trong ******* 67 or 68 duoc ko? Minh ko hieu cau tra loi cua *******, neu tinh theo host roi assign host address thi mình ko thay dung. Mong moi nguoi giup do
thanx nhieu

[peterpan]

Chao diepsuzu !
Ban hoi cau 54 và 55 trong part nao?
Neu là Part I thì cau 54 ******** tra lời sai. Và câu 55 thì nó trả lời quá rõ rồi Khi thi CCNA thật chắc chắn có câu này đấy bạn phải trả lời 2 câu này thật chắc chắn vì nó rơi vào phần Drop and Drap.

Good luck !.

[peterpan]

Chào dungnd44c

QUESTION NO: 1
Which of the following factors determines the OSPF router ID when configuring a router with both physical and logical interfaces?
A. The lowest network number of any interface.
B. The highest network number of any interface.
C. The highest IP address of any logical interface.
D. The middle IP address of any logical interface.
E. The lowest IP address of any physical interface.
F. The highest IP address of any physical interface.
G. The lowest IP address of any logical interface


Câu này chỉ có duy nhất Câu C. là đúng , đọc lại OSPF đi không có thi trượt đấy !

Good Luck !