CompTIA Network+ (N10-007) — Question 69

Which of the following would be the MOST efficient subnet mask for a point-to-point link?

Answer options

• A. /28
• B. /29
• C. /31
• D. /32

Correct answer: C

Explanation

The correct answer is /31, which is optimal for point-to-point links as it allows for two IP addresses, one for each end of the connection. Options /28 and /29 provide more addresses than necessary for a single link, while /32 is not suitable since it designates a single host without a usable link.