ISRO | ISRO CS 2015 | Question 53
In a class B subnet, we know the IP address of one host and the mask as given below:
IP address: 125.134.112.66
Mask: 255.255.224.0
What is the first address(Network address)?
(A) 125.134.96.0
(B) 125.134.112.0
(C) 125.134.112.66
(D) 125.134.0.0
Answer: (A)
Explanation: We can obtain Network Address by performing bitwise and operation of IP address and Subnet Mask.
IP address: 125.134.112.66
Subnet Mask: 255.255.224.0
IP address: 01111101 10000110 01110000 01000010
Subnet Mask: 11111111 11111111 11100000 00000000
Network ID: 01111101 10000110 01100000 00000000
So, Network Address = 125.134.96.0
Option (A) is correct.
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Last Updated :
05 Apr, 2018
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