farontek
20-10-2004, 03:06 PM
Có mấy thắc mắc về WAN, mong được các bạn cùng trao đổi:
QUESTION NO: 18
You are a network technician at ********. The ******** network is illustrated in the following exhibit. 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: 37
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.
QUESTION NO: 177
Study the Exhibit below carefully:
You work as a network administrator at ********, You received complaints from the ******** employees that their Frame Relay connection to the corporate site is very slow. You have a suspicion that the link is overloaded. Which output value indicates to the local router that traffic is sent to the corporate site is experiencing congestion taking into account the partial output of the Router# show frame relay pvc command shown in the exhibit?
A. in DE packets 0
B. last time PVC status changed 00:25:40
C. in BECN packets 192
D. DLCI = 100
E. in FECN packets 147
QUESTION NO: 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 all that apply.)
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.
QUESTION NO: 281
What are the advantages of encapsulating an ISDN link with PPP instead of HDLC? (Choose two.)
A. PPP is consistently implemented among different equipment vendors.
B. PPP will run faster and more efficiently than HDLC on circuit-switched ISDN links.
C. PPP authentication will prevent unauthorized callers from establishing an ISDN circuit.
D. PPP is easier to configure and maintain than HDLC.
E. PPP can be routed across public facilities, while HDLC is not routable in circuit-switched networks.
QUESTION NO: 18
You are a network technician at ********. The ******** network is illustrated in the following exhibit. 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: 37
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.
QUESTION NO: 177
Study the Exhibit below carefully:
You work as a network administrator at ********, You received complaints from the ******** employees that their Frame Relay connection to the corporate site is very slow. You have a suspicion that the link is overloaded. Which output value indicates to the local router that traffic is sent to the corporate site is experiencing congestion taking into account the partial output of the Router# show frame relay pvc command shown in the exhibit?
A. in DE packets 0
B. last time PVC status changed 00:25:40
C. in BECN packets 192
D. DLCI = 100
E. in FECN packets 147
QUESTION NO: 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 all that apply.)
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.
QUESTION NO: 281
What are the advantages of encapsulating an ISDN link with PPP instead of HDLC? (Choose two.)
A. PPP is consistently implemented among different equipment vendors.
B. PPP will run faster and more efficiently than HDLC on circuit-switched ISDN links.
C. PPP authentication will prevent unauthorized callers from establishing an ISDN circuit.
D. PPP is easier to configure and maintain than HDLC.
E. PPP can be routed across public facilities, while HDLC is not routable in circuit-switched networks.