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ISRO | ISRO CS 2013 | Question 42

  • Last Updated : 15 May, 2018

What is IP class and number of sub-networks if the subnet mask is
(A) Class A, 3

(B) Class A, 8
(C) Class B, 3
(D) Class B, 32

Answer: (B)

Explanation: Subnet mask = 11111111.11100000.00000000.00000000

The first 8 bits represent Class A network address
And next 3 ones used for subnet. Number of subnets = 2^3=8.

(B) is the correct answer.

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