Ip addressing and Subnetting exercise

I got some exercises from my friend to practice IP addressing and subnetting skill and I want to share with you 'cos I'm not really understand about Subnetting , can you guys help me explain the subject and the way( detail pls ) to do these ex?, thanks

1. Host IP add : 196.200.64.221
Sub Mask : 255.255.255.240
a. Network ID class : C
b. Major network address : 196.200.64.0
c Major broadcast address : 225.225.225.0
d. First host of the major network :?
e. Last host of the major network :?

f. Number of subnet bits :
g. Number of host bits :
h. Subnet address for the given host IP address :
i. Range of host addresses for this subnet :
j. Broadcast address for 9th subnet :

k. Total number of useable subnet ( minus 2 , excluding the all zeros and all ones subnets ) :?
m. Number of valid host IP addresses per subnet ( minus 2 , excluding the network and broadcast address ) :?
n. Subnetwork address with slash (/) mask for assigned subnet

2. Host IP add : 176.255.153.159
Sub Mask : 255.255.240.0
a. Network ID class : B
b. Major network address : 176.255.0.0
c Major broadcast address : 176.255.255.255
d. First host of the major network :176.255.0.1 ( I'm not sure , pls explain me for these questions )
e. Last host of the major network :176.255.255.254?

f. Number of subnet bits :
g. Number of host bits :
h. Subnet address for the given host IP address :
i. Range of host addresses for this subnet:
j. Broadcast address for 9th subnet :

k. Total number of useable subnets ( minus 2 , excluding the all zeros and all ones subnets ) :?
m. Number of valid host IP addresses per subnet ( minus 2 , excluding the network and broadcast address ) :?
n. Subnetwork address with slash (/) mask for assigned subnet :

[chipchipzzz]

Hi there,

please see this:
http://www.vnpro.org/forum/viewtopic.php?t=59
http://www.vnpro.org/forum/viewtopic.php?t=1375
http://www.vnpro.org/forum/viewtopic.php?t=2314
http://www.vnpro.org/forum/viewtopic.php?t=3153
http://www.vnpro.org/forum/viewtopic.php?t=898
http://www.vnpro.org/forum/viewtopic.php?t=1104

and: http://www.vnpro.org/forum/viewtopic.php?t=141

Thanks for your help :D . Now I'm lookin' for the result to compare with my own . Sorry for the vietnamese but My PC haves trouble with unicode and I can't type vnese , so I must writing in Eng like this , sorry .

[imported_g_dragon]

1. Host IP add : 196.200.64.221
Sub Mask : 255.255.255.240
a. Network ID class : C
b. Major network address : 196.200.64.0
c Major broadcast address : 196.200.64.225
d. First host of the major network 196.200.64.1
e. Last host of the major network 196.200.64.254

f. Number of subnet bits : 4
g. Number of host bits : 8-4=4
h. Subnet address for the given host IP address : 196.200.64.208
i. Range of host addresses for this subnet : 196.200.64.208-->222
j. Broadcast address for 9th subnet : 196.200.64.143

k. Total number of useable subnet ( minus 2 , excluding the all zeros and all ones subnets ) :16-2=14
m. Number of valid host IP addresses per subnet ( minus 2 , excluding the network and broadcast address ) 16-2=14
n. Subnetwork address with slash (/) mask for assigned subnet /28

Theo mình là vậy, không biết có gì sai không. Hiện mình không rãnh lắm, nhờ các bạn khác, chỉnh sữa bổ sung thêm. Câu 2 chỉ tương tự thôi

[lehuytoan]

g_dragon,
Mình nghĩ là câu c bạn gõ nhầm.
Theo mình major broadcast add: 196.200.64.255
Mong mọi người góp ý thêm.

[cuongnh]

g_dragon is true

[nguyenthanhtung32]

không nhầm đâu vì broadcast thỉ các bit host phải bật lên 1,
mà ở đây là major tức là gởi cho tất cả các subnet nên lại bật các bit ở subnet lên 1 luôn

[cong_ly]

1. Host IP add : 196.200.64.221
Sub Mask : 255.255.255.240
a. Network ID class : C
b. Major network address : 196.200.64.0
c Major broadcast address : 192.200.64.255
d. First host of the major network :? 196.200.64.1
e. Last host of the major network :? 196.200.64.254

f. Number of subnet bits :4
g. Number of host bits : 4
h. Subnet address for the given host IP address : 196.200.64.208
i. Range of host addresses for this subnet : 196.200.64.209 -> 196.200.64.222
j. Broadcast address for 9th subnet : 196.200.64.127
k. Total number of useable subnet ( minus 2 , excluding the all zeros and all ones subnets ) :? 14
m. Number of valid host IP addresses per subnet ( minus 2 , excluding the network and broadcast address ) :? 14
n. Subnetwork address with slash (/) mask for assigned subnet: 196.200.64.208/28

2. Host IP add : 176.255.153.159
Sub Mask : 255.255.240.0
a. Network ID class : B
b. Major network address : 176.255.0.0
c Major broadcast address : 176.255.255.255
d. First host of the major network :176.255.0.1 ( I'm not sure , pls explain me for these questions )
e. Last host of the major network :176.255.255.254?

f. Number of subnet bits : 4
g. Number of host bits : 12
h. Subnet address for the given host IP address :176.255.144.0
i. Range of host addresses for this subnet: 176.255.144.1 -> 176.255.159.254
j. Broadcast address for 9th subnet : 176.255.127.255

k. Total number of useable subnets ( minus 2 , excluding the all zeros and all ones subnets ) :? 14
m. Number of valid host IP addresses per subnet ( minus 2 , excluding the network and broadcast address ) :? 4094
n. Subnetwork address with slash (/) mask for assigned subnet : 176.255.144.0/20