CompTIA Network+ (N10-009) — Question 377

A network technician is designing a LAN for a new facility. The company is expecting more than 300 devices to connect to the network. Which of the following masks will provide the most efficient subnet?

Answer options

• A. 255.255.0.0
• B. 255.255.192.0
• C. 255.255.254.0
• D. 255.255.255.254

Correct answer: C

Explanation

The correct answer is C, as the subnet mask 255.255.254.0 allows for 510 usable IP addresses, which accommodates the 300 devices needed. Option A provides too many addresses for the requirement, while B offers only 1022 usable addresses, and D only allows for 2 usable IPs, which is insufficient for the project.