If a host on a network has the address 172.16.45.14/30, what is the subnetwork this host belongs to?

172.16.45.0
172.16.45.4
172.16.45.8
172.16.45.12

Correct Answer: 172.16.45.12

Explanation:

A/30, regardless of the class of address, has a 252 in the fourth octet. This means we have a block size of 4 and our subnets are o,4,8,12,16, etc. Address 14 is obviously in the 12 subnet.

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