Solving your subnetting problems

(source: CCBOOTCAMP study guide)

Problem: Find subnet mask for a network in which you need no more than 60 hosts

Using the table below:

We see that the subnet we need is with 2 bits, so it should be: 255.255.255.192, Number of subnets 4, and number of Hosts are 62.

Bits

1

2

3

4

5

6

7

8

Binary

128

64

32

16

8

4

2

1

Subnets

128

192

224

240

248

252

254

255

#Hosts (Binary – 2)

126

62

30

14

6

2

0

0

# of Subnets (double each number)

2

4

8

16

32

64

128

256

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