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Computer Networks
Mcqs
Q
What is the subnet id of a host with an IP address 172.16.66.0/21?
AA. 172.16.36.0
BB. 172.16.48.0
CC. 172.16.64.0
DD. 172.16.0.0
Correct Answer:
C. C. 172.16.64.0
Explanation:
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.
