Question

An organization is granted the block 130.34.12.64 / 26. It needs to have four subnets. Which of the following is not an address of this organization?
1. 130.34.12.124
2. 130.34.12.89
3. 130.34.12.70
4. 130.34.12.132

Answer 1

Correct Answer - Option 4 : 130.34.12.132

The correct answer is option 4.

EXPLANATION 

The given block 130.34.12.64/26

Here subnet mask will be, 1111 1111.1111 1111.1111 1111.1100 0000 (26 1's)

255.255.255.192 (1111 1111.1111 1111.1111 1111.1100 0000 )(MASK)    130.34.12.64       (1000 0010.0010 0010.0000 1100.1000 0000 )(IP Address)

130.34.12.64       (1000 0010.0010 0010.0000 1100.1000 0000 )

 

 

 

The range of the IP's available to the Organization 

00000000 00000000 00000000 00111111=64

Dividing it into four subnets will give,

Subnet 1: 130.34.12.64 to 130.34.12.79

Subnet 2: 130.34.12.80 to 130.34.12.95

Subnet 3: 130.34.12.96 to 130.34.12.111

Subnet 4: 130.34.12.112 to 130.34.12.127

So, 130.34.12.132 is not in range.

Hence the correct answer is 130.34.12.132.