AWS Certified SysOps Administrator – Associate (legacy) — Question 177

A user has created a VPC with CIDR 20.0.0.0/24. The user has used all the IPs of CIDR and wants to increase the size of the VPC. The user has two subnets: public (20.0.0.0/28) and private (20.0.1.0/28). How can the user change the size of the VPC?

Answer options

• A. The user can delete all the instances of the subnet. Change the size of the subnets to 20.0.0.0/32 and 20.0.1.0/32, respectively. Then the user can increase the size of the VPC using CLI
• B. It is not possible to change the size of the VPC once it has been created
• C. The user can add a subnet with a higher range so that it will automatically increase the size of the VPC
• D. The user can delete the subnets first and then modify the size of the VPC

Correct answer: B

Explanation

The correct answer is B because once a VPC is created, its size cannot be modified. Options A, C, and D incorrectly suggest methods to change the VPC size, which is not allowed after initial creation.