CompTIA Network+ (N10-007) — Question 56

A network administrator is configuring the 172.16.40.0/22 network for a new building. Which of the following is the number of hosts that will be supported on this network?

Answer options

• A. 510
• B. 512
• C. 1022
• D. 1024
• E. 2046
• F. 2048

Correct answer: C

Explanation

The /22 subnet allows for 2^(32-22) = 2^10 = 1024 total IP addresses. However, 2 addresses are reserved (one for the network and one for the broadcast), leaving 1022 usable host addresses. Therefore, the correct answer is C, while the other options either overestimate or underestimate the number of usable hosts.