CompTIA Network+ (N10-008) — Question 859

A network administrator is creating a subnet for a remote office that has 53 network devices. An additional requirement is to use the most efficient subnet. Which of the following CIDR notations indicates the appropriate number of IP addresses with the LEAST amount of unused addresses?

Answer options

• A. /24
• B. /26
• C. /28
• D. /32

Correct answer: B

Explanation

The correct answer is B (/26), as it supports 64 IP addresses, allowing for 53 devices and 11 addresses for future use. Option A (/24) provides 256 addresses, which is excessive, while C (/28) only offers 16 addresses, insufficient for the requirement. D (/32) allows for only one address, which is not suitable for multiple devices.