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Variable Length Subnet Masks (VLSMs)

FIGURE 3.8

VLSM table, example two

Variable Length Subnet Masks Worksheet

Subnet

Mask

Subnets

/26

192

2

/27

224

6

/28

240

14

/29

248

30

/30

252

62

Network

Hosts

Block

A

30

32

B

10

16

C

12

16

D

2

4

E

2

4

F

2

4

G

12

16

H

60

64

I

14

16

J

60

64

K

8

16

L M

Class C Network

Hosts

Block

62

64

30

32

14

16

6

8

2

4

192.168.10.0

Subnet

Mask

32

224

0

240

16

240

244

252

248

252

252

252

208

240

64

192

192

240

128

192

224

240

0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 88 92 96 100 104 108 112 116 120 124 128 132 136 140 144 148 152 156 160 154 158 172 176 180 184 188 192 196 200 204 208 212 216 220 224 228 232 236 240 244 248 252 256

B - 192.16.10.0/28

C - 192.16.10.16/28

A - 192.16.10.32/27

H - 192.16.10.64/26

J - 192.16.10.128/26

I - 192.16.10.192/28

G - 192.16.10.208/28

K - 192.16.10.224/28

D - 192.16.10.244/30 E - 192.16.10.248/30 F - 192.16.10.252/30

139

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