Define the Sub Subnets for Subnet #14 14 (140.25.238.0/24)

After Subnet #14 is divided into 16 subnets, Subnet #14 14 is subdi 

vided into eight equally sized address blocks, as shown in Figure 26.

F I G U R E   2 6 .   S u b   S u b n e t s   f o r   S u b n e t   # 1 4   1 4

( 1 4 0 . 2 5 . 2 3 8 . 0 / 2 4 )

Since 8 = 23, three more bits are required to identify each of the eight

subnets. This means that the organization will need to use a /27 as the

extended network prefix length. 

The eight subnets of the 140.25.238.0/24 address block are listed in the

following sample code. The subnets are numbered 0 through 7. The

underlined portion of each sub subnet address identifies the extended

network prefix, while the bold digits identify the 3 bits representing

the subnet number field: 

Subnet #14 14: 10001100.00011001.11101110 .00000000 = 140.25.238.0/24

Subnet#14 14 0: 10001100.00011001.11101110.000 00000 = 140.25.238.0/27 

Subnet#14 14 1: 10001100.00011001.11101110.001 00000 = 140.25.238.32/27 

Subnet#14 14 2: 10001100.00011001.11101110.010 00000 = 140.25.238.64/27 

Subnet#14 14 3: 10001100.00011001.11101110.011 00000 = 140.25.238.96/27 

Subnet#14 14 4: 10001100.00011001.11101110.100 00000 = 140.25.238.128/27 

Subnet#14 14 5: 10001100.00011001.11101110.101 00000 = 140.25.238.160/27 

Subnet#14 14 6: 10001100.00011001.11101110.110 00000 = 140.25.238.192/27 

Subnet#14 14 7: 10001100.00011001.11101110.111 00000 = 140.25.238.224/27 

U N D E R S TA N D I N G   I P   A D D R E S S I N G

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