Subnetting Class B Address Problem 4

Must Remind (Keep in Mind)

128 |  1 0 0 0 0 0 0 0   (i.e. 1 Bit ON and 7 OFF)

192 |  1 1 0 0 0 0 0 0   (i.e. 2 Bits ON and 6 OFF)

224 |  1 1 1 0 0 0 0 0    (i.e. 3 Bits ON and 5 OFF)

240 |  1 1 1 1 0 0 0 0    (i.e. 4 Bits ON and 4 OFF)

248 |  1 1 1 1 1 0 0 0    (i.e. 5 Bits ON and 3 OFF)

252 |  1 1 1 1 1 1 0 0    (i.e. 6 Bits ON and 2 OFF)

254 |  1 1 1 1 1 1 1 0    (i.e. 7 Bits ON and 1 OFF)

255 |  1 1 1 1 1 1 1 1    (i.e. 8 Bits ON and  0 OFF)

PROBLEM  4.

172.16.0.0 (Network Address)
255.255.240.0 (/20)

Network = 2^4 = 16
Hosts =      2^12 - 2 = 4094 ( 4 bits in 3rd octet and 4th bits in 8 octet)

valid subnets = 256-240=16. 

Block Size =  0 ,16,3248, 64,80, 96,112, 128,144, 160,176 ,192,208 ,224,240   

NETWORK 1

172.16.0.0  (Network ID)
172.16.0.1  (First Host)
172.16.0.2
172.16.0.3
.
.
.
172.16.7.252
172.16.7.253
172.16.7.254 (Last Host)
172.16.7.255 (Broadcast ID)

MUST READ

when the address 0.255  after that 3rd octet will be started from 1.0 then 1.1, 1.2, 1.3 similarly address reach 1.255  3rd octet will start From  2.0  Similarly  all the address will allocate in a same way. ( For Understanding the Procedure)

NETWORK  2

172.16.8.0  (Network ID)
172.16.8.1  (First Host)
172.16.8.2
172.16.8.3
.
.
.
172.16.15.252
172.16.15.253
172.16.15.254  (Last Host)
172.16.15.255  (Broadcast ID)

NETWORK  3

172.16.16.0  (Network ID)
172.16.16.1  (First Host)
172.16.16.2
172.16.16.3
.
.
.
172.16.23.252
172.16.23.253
172.16.23.254  (Last Host)
172.16.23.255  (Broadcast ID)

NETWORK  4

172.16.24.0  (Network ID)
172.16.24.1  (First Host)
172.16.24.2
172.16.24.3
.
.
.
172.16.31.252
172.16.31.253
172.16.31.254  (Last Host)

172.16.31.255  (Broadcast ID)

NETWORK  5

172.16.32.0  (Network ID)
172.16.32.1  (First Host)
172.16.32.2
172.16.32.3
.
.
.
172.16.39.252
172.16.39.253
172.16.39.254  (Last Host)

172.16.39.255  (Broadcast ID)

NETWORK  6

172.16.40.0  (Network ID)
172.16.40.1  (First Host)
172.16.40.2
172.16.40.3
.
.
.
172.16.47.252
172.16.47.253
172.16.47.254  (Last Host)

172.16.47.255  (Broadcast ID)

NETWORK  7

172.16.48.0  (Network ID)
172.16.48.1  (First Host)
172.16.48.2
172.16.48.3
.
.
.
172.16.55.252
172.16.55.253
172.16.55.254  (Last Host)

172.16.55.255  (Broadcast ID)

NETWORK  8

172.16.56.0  (Network ID)
172.16.56.1  (First Host)
172.16.56.2
172.16.56.3
.
.
.
172.16.63.252
172.16.63.253
172.16.63.254  (Last Host)

172.16.63.255  (Broadcast ID)

NETWORK  9

172.16.64.0  (Network ID)
172.16.64.1  (First Host)
172.16.64.2
172.16.64.3
.
.
.
172.16.71.252
172.16.71.253
172.16.71.254  (Last Host)

172.16.71.255  (Broadcast ID)

NETWORK  10

172.16.72.0  (Network ID)
172.16.72.1  (First Host)
172.16.72.2
172.16.72.3
.
.
.
172.16.739.252
172.16.79.253
172.16.79.254  (Last Host)

172.16.79.255  (Broadcast ID)

NETWORK  11

172.16.80.0  (Network ID)
172.16.80.1  (First Host)
172.16.80.2
172.16.80.3
.
.
.
172.16.87.252
172.16.87.253
172.16.87.254  (Last Host)

172.16.87.255  (Broadcast ID)

NETWORK  12

172.16.88.0  (Network ID)
172.16.88.1  (First Host)
172.16.88.2
172.16.88.3
.
.
.
172.16.95.252
172.16.95.253
172.16.95.254  (Last Host)

172.16.95.255  (Broadcast ID)

NETWORK  13

172.16.96.0  (Network ID)
172.16.96.1  (First Host)
172.16.96.2
172.16.96.3
.
.
.
172.16.103.252
172.16.103.253
172.16.103.254  (Last Host)

172.16.103.255  (Broadcast ID)

NETWORK  14

172.16.104.0  (Network ID)
172.16.104.1  (First Host)
172.16.104.2
172.16.104.3
.
.
.
172.16.111.252
172.16.111.253
172.16.111.254  (Last Host)

172.16.111.255  (Broadcast ID)

NETWORK  15

172.16.112.0  (Network ID)
172.16.112.1  (First Host)
172.16.112.2
172.16.112.3
.
.
.
172.16.119.252
172.16.119.253
172.16.119.254  (Last Host)

172.16.119.255  (Broadcast ID)

NETWORK  16

172.16.120.0  (Network ID)
172.16.120.1  (First Host)
172.16.120.2
172.16.120.3
.
.
.
172.16.127.252
172.16.127.253
172.16.127.254  (Last Host)

172.16.127.255  (Broadcast ID)