If you required 1000 IP host identities for your network, which of the following CIDR addresses would be valid if you want to make the best use of IP addressing?
A) 161.15.37.16/12
B) 161.15.37.16/20
C) 161.15.37.16/22
D) 161.15.37.16/25

Question

Quizplus · Accepted Answer

To accommodate 1000 IP host identities, we need a CIDR block with at least 10 bits of host addressing (since 2^10 = 1024). The closest valid CIDR block that gives us at least 10 bits of host addressing is /22, which gives us 2^10 = 1024 IP host addresses. Therefore, choice C (161.15.37.16/22) is the best option. The other options either provide more IP addresses than necessary or not enough.

If You Required 1000 IP Host Identities for Your Network