CompTIA Network+ (N10-007) — Question 241

A network technician needs to subnet the network. The marketing department has 28 devices. Which of the following private IP address spaces should be used to ensure the MINIMUM number of unused IP addresses?

Answer options

Correct answer: C

Explanation

Option C is correct because a /27 subnet (255.255.255.224) provides 32 IP addresses, which is sufficient for 28 devices while leaving only 4 unused addresses. Options A and D both use a /26 subnet (255.255.255.192), providing 62 addresses, resulting in more unused addresses than necessary. Option B also uses a /27 subnet but is not a private IP address range.