On the network 131.1.123.0/27, what is the last IP address that can be assigned to a host?


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A. 131.1.123.30
B. 131.1.123.31
C. 131.1.123.32
D. 131.1.123.33

Answer : A


Explanation:

IP Address: 131.1.123.0 /27

Subnet Mask (Binary) : 11111111 . 11111111 . 11111111 . 1110000
Subnet Mask : 255.255.255.224

Lets subtract 224 from 256.
256 - 224 = 32.

Network Address Broadcast Address
0 31
32 63
64  


The last IP address will be 131.1.123.30.

Network Address : 131.1.123.0
Broadcast Address : 131.1.123.31

Valid IP Range : 131.1.123.1 to 131.1.123.30
Maximum Hosts Available : 25-2 = 30

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