Computer Networks | Network Layer | Question 2

In class C , if subnet mask is 255.255.255.224 then calculates number of subnet?
(A) 6
(B) 8
(C) 4
(D) None of the Above


Answer: (B)

Explanation: Default subnet mask of class C is 255.255.255.0.
In subnetting Number of bits are borrowed from host bits.
Given Subnet mask 11111111.11111111.11111111.11100000
3 bits are borrowed form host bits as default subnet mask is 11111111.11111111.11111111.00000000
Number of Subnets = 2^n, n is number of bits borrowed from host bits i.e 3
= 8 subnets possible.

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