AWS Certified Advanced Networking – Specialty (ANS-C00) — Question 137

You need to create a subnet in a VPC that supports 14 hosts. You need to be as accurate as possible since you run a very large company. What CIDR should you use?

Answer options

• A. /28
• B. /24
• C. /25
• D. /27

Correct answer: D

Explanation

The correct CIDR is /27, which provides 32 IP addresses, allowing for 30 usable hosts after accounting for the network and broadcast addresses. A /28 offers only 16 addresses (14 usable), which is insufficient, while /24 and /25 provide more addresses than necessary for just 14 hosts.