AWS Certified SysOps Administrator – Associate (SOA-C03) — Question 50

A CloudOps engineer creates a new VPC that includes a public subnet and a private subnet. The CloudOps engineer successfully launches 11 Amazon EC2 instances in the private subnet The CloudOps engineer attempts to launch one more EC2 instance in the same subnet. However, the CloudOps engineer receives an error message that states that not enough free IP addresses are available.
What must the CloudOps engineer do to deploy more EC2 instances?

Answer options

• A. Edit the private subnet to change the CIDR block to /27.
• B. Edit the private subnet to extend across a second Availability Zone.
• C. Assign additional Elastic IP addresses to the private subnet.
• D. Create a new private subnet to hold the required EC2 instances.

Correct answer: D

Explanation

The correct answer is D because creating a new private subnet allows for additional IP addresses to be allocated for more EC2 instances. Options A and B do not resolve the issue of IP address availability, as changing the CIDR block or extending across an Availability Zone does not increase the total usable IPs in the existing subnet. Option C is incorrect because Elastic IP addresses are not applicable to private subnets; they are used for public IPs.