You have a class B network 172.16.0.0. You use a 11 bits for subnetting. Which of the following is a correct range of Ip addresses that belong to the same network.

a. 255.255.8.1 to 255.255.14.254

b. 255.255.255.9 to 255.255.255.14

c. 255.255.17.1 to 255.255.22.254

d. 255.255.17.0 to 255.255.22.255

Answer Posted / indu

C

Explanation:

If you are using 11 bits for subnetting, you have 5 Netowrk Bits and 11 Node bits

From the subnetting formulas above:

M=5 N=11

The first range = 255.255.X.1 to 255.255.Y.254

where X = 2^(N-8)+1 and Y= 2^(N-8+1)-2

For the next ranges, just add 2^(N-8) at each end of the range

The first range = 255.255.9.1 to 255.255.14.254

2^(N-8) = 2^3 = 8

The second range = 255.255.17.1 to 255.255.22.254

so on and so forth.

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