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What is the subnetwork number of a host with an IP address of 172.16.66.0/21?

A. 172.16.36.0

B. 172.16.48.0

C. 172.16.64.0

D. 172.16.0.0

Answer: Option C

Solution(By Examveda Team)

A /21 is 255.255.248.0, which means we have a block size of 8 in the third octet, so we just count by 8 until we reach 66. The subnet in this question is 64.0. The next subnet is 72.0, so the broadcast address of the 64 subnet is 71.255.

This Question Belongs to Networking >> Subnetting

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