CompTIA Network+ (N10-009) — Question 200

A network administrator needs to divide 192.168.1.0/24 into two equal halves. Which of the following subnet masks should the administrator use?

Answer options

• A. 255.255.0.0
• B. 255.255.254.0
• C. 255.255.255.0
• D. 255.255.255.128

Correct answer: D

Explanation

The correct subnet mask is 255.255.255.128, which allows the network to be divided into two subnets of 128 addresses each. The other options either do not provide the necessary subnetting to split the network into two equal parts or are not suitable for a /24 network.