CompTIA Network+ (N10-009) — Question 143

A network administrator needs to connect two routers in a point-to-point configuration and conserve IP space. Which of the following subnets should the administrator use?

Answer options

• A. /24
• B. /26
• C. /28
• D. /30

Correct answer: D

Explanation

The correct answer is /30 because it provides exactly two usable IP addresses, which is sufficient for a point-to-point connection between two routers. The other options, /24, /26, and /28, offer more IP addresses than necessary, thus wasting IP space.