Subnetting Class B Address

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)

CLASS B

255.255.0.0                                                 /16 

255.255.128.0                                             /17

255.255.192.0                                             /18

255.255.224.0                                             /19

255.255.240.0                                             /20

255.255.248.0                                             /21

255.255.252.0                                             /22

255.255.254.0                                             /23

Subnetting Class C Address Problem 4

192.168.10.0 /28  (IP Address)

So  Subnet Mask is  255.255.255.240 (i.e. /27 )

224 means 4 ON bits and  4 OFF

Valid Subnets = 256-240 ==>16

Block :: 0 ,16, 32,48 , 64,80, 96,112, 128,144, 160,176,192,208,224,240 

Network = 2^4==> 16

host = 2^4-2==> 14

NETWORK 1

192.168.0.0 (Network ID)
192.168.0.1
192.168.0.2
192.168.0.3
192.168.0.4
.
.
.
.
192.168.0.11
192.168.0.12
192.168.0.13
192.168.0.14
192.168.0.15(Broadcast ID)

NETWORK 2

192.168.0.16 (Network ID)
192.168.0.17
192.168.0.18
192.168.0.19
192.168.0.20
.
.
.
.
.
192.168.0.27
192.168.0.28
192.168.0.29
192.168.0.30
192.168.0.31 (Broadcast ID)

NETWORK 3

192.168.0.32 (Network ID)
192.168.0.33
192.168.0.34
192.168.0.35
192.168.0.36
.
.
.
.
.
192.168.0.43
192.168.0.44
192.168.0.45
192.168.0.46
192.168.0.47 (Broadcast ID)

NETWORK 4

192.168.0.48 (Network ID)
192.168.0.49
192.168.0.50
192.168.0.51
192.168.0.52
.
.
.
.
.
192.168.0.59
192.168.0.60
192.168.0.61
192.168.0.62
192.168.0.63(Broadcast ID)

NETWORK 5

192.168.0.64 (Network ID)
192.168.0.65
192.168.0.66
192.168.0.67
192.168.0.68
.
.
.
.
192.168.0.75
192.168.0.76
192.168.0.77
192.168.0.78
192.168.0.79(Broadcast ID)

NETWORK 6

192.168.0.80 (Network ID)
192.168.0.81
192.168.0.82
192.168.0.83
192.168.0.84
.
.
.
.
.
192.168.0.91
192.168.0.92
192.168.0.93
192.168.0.94
192.168.0.95 (Broadcast ID)

NETWORK 7

192.168.0.96 (Network ID)
192.168.0.97
192.168.0.98
192.168.0.99
192.168.0.100
.
.
.
.
.
192.168.0.107
192.168.0.108
192.168.0.109
192.168.0.110
192.168.0.111(Broadcast ID)

NETWORK 8

192.168.0.112 (Network ID)
192.168.0.113
192.168.0.114
192.168.0.115
192.168.0.116
.
.
.
.
.
192.168.0.123
192.168.0.124
192.168.0.125
192.168.0.126
192.168.0.127 (Broadcast ID)

NETWORK  9

192.168.0.128 (Network ID)
192.168.0.129
192.168.0.130
192.168.0.131
192.168.0.132
.
.
.
.
192.168.0.139
192.168.0.140
192.168.0.141
192.168.0.142
192.168.0.143 (Broadcast ID)

NETWORK 10

192.168.0.144 (Network ID)
192.168.0.145
192.168.0.146
192.168.0.147
192.168.0.148
.
.
.
.
.
192.168.0.155
192.168.0.156
192.168.0.157
192.168.0.158
192.168.0.159 (Broadcast ID)

NETWORK 11

192.168.0.160 (Network ID)
192.168.0.161
192.168.0.162
192.168.0.163
192.168.0.164
.
.
.
.
.
192.168.0.171
192.168.0.172
192.168.0.173
192.168.0.174
192.168.0.175 (Broadcast ID)

NETWORK 12

192.168.0.176 (Network ID)
192.168.0.177
192.168.0.178
192.168.0.179
192.168.0.180
.
.
.
.
.
192.168.0.187
192.168.0.188
192.168.0.189
192.168.0.190
192.168.0.191 (Broadcast ID)

NETWORK 13

192.168.0.192 (Network ID)
192.168.0.193
192.168.0.194
192.168.0.195
192.168.0.196
.
.
.
.
192.168.0.203
192.168.0.204
192.168.0.205
192.168.0.206
192.168.0.207 (Broadcast ID)

NETWORK 14

192.168.0.208 (Network ID)
192.168.0.209
192.168.0.210
192.168.0.211
192.168.0.212
.
.
.
.
.
192.168.0.219
192.168.0.220
192.168.0.221
192.168.0.222
192.168.0.223 (Broadcast ID)

NETWORK 15

192.168.0.224 (Network ID)
192.168.0.225
192.168.0.226
192.168.0.227
192.168.0.228
.
.
.
.
.
192.168.0.235
192.168.0.236
192.168.0.237
192.168.0.238
192.168.0.239 (Broadcast ID)

NETWORK 16

192.168.0.240 (Network ID)
192.168.0.241
192.168.0.242
192.168.0.243
192.168.0.244
.
.
.
.
.
192.168.0.251
192.168.0.252
192.168.0.253
192.168.0.254
192.168.0.255 (Broadcast ID)

Subnetting Class C Address Problem 3

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Problem 3.

192.168.10.0 /27  (IP Address)

So  Subnet Mask is  255.255.255.224 (i.e. /27 )

224 means 3 ON bits and  5 OFF

Valid Subnets = 256-224 ==>32

Block :: 0 , 32 , 64, 96, 128, 160, 192, 224 

Network = 2^3==> 

host = 2^5-2==> 30

NETWORK 1

192.168.0.0 (Network ID)
192.168.0.1
192.168.0.2
192.168.0.3
192.168.0.4
.
.
.
.
192.168.0.27
192.168.0.28
192.168.0.29
192.168.0.30
192.168.0.31 (Broadcast ID)

NETWORK 2

192.168.0.32 (Network ID)
192.168.0.33
192.168.0.34
192.168.0.35
192.168.0.36
.
.
.
.
.
192.168.0.59
192.168.0.60
192.168.0.61
192.168.0.62
192.168.0.63 (Broadcast ID)

NETWORK 3

192.168.0.64 (Network ID)
192.168.0.65
192.168.0.66
192.168.0.67
192.168.0.68
.
.
.
.
.
192.168.0.91
192.168.0.92
192.168.0.93
192.168.0.94
192.168.0.95 (Broadcast ID)

NETWORK 4

192.168.0.96 (Network ID)
192.168.0.97
192.168.0.98
192.168.0.99
192.168.0.100
.
.
.
.
.
192.168.0.123
192.168.0.124
192.168.0.125
192.168.0.126
192.168.0.127 (Broadcast ID)

x

NETWORK 5

192.168.0.128 (Network ID)
192.168.0.129
192.168.0.130
192.168.0.131
192.168.0.132
.
.
.
.
192.168.0.155
192.168.0.156
192.168.0.157
192.168.0.158
192.168.0.159 (Broadcast ID)

NETWORK 6

192.168.0.160 (Network ID)
192.168.0.161
192.168.0.162
192.168.0.163
192.168.0.164
.
.
.
.
.
192.168.0.187
192.168.0.188
192.168.0.189
192.168.0.190
192.168.0.191 (Broadcast ID)

NETWORK 7

192.168.0.192 (Network ID)
192.168.0.193
192.168.0.194
192.168.0.195
192.168.0.196
.
.
.
.
.
192.168.0.219
192.168.0.220
192.168.0.221
192.168.0.222
192.168.0.223 (Broadcast ID)

NETWORK 8

192.168.0.224 (Network ID)
192.168.0.225
192.168.0.226
192.168.0.227
192.168.0.228
.
.
.
.
.
192.168.0.251
192.168.0.252
192.168.0.253
192.168.0.254
192.168.0.255 (Broadcast ID)