AWS Certified SysOps Administrator – Associate (legacy) — Question 405

A company is setting up a VPC peering connection between its VPC and a customer's VPC. The company VPC is an IPv4 CIDR block of 172.16.0.0/16, and the customer's is an IPv4 CIDR block of 10.0.0.0/16. The SysOps Administrator wants to be able to ping the customer's database private IP address from one of the company's Amazon EC2 instances.
What action should be taken to meet the requirements?

Answer options

• A. Ensure that both accounts are linked and are part of consolidated billing to create a file sharing network, and then enable VPC peering.
• B. Ensure that both VPC owners manually add a route to the VPC route tables that points to the IP address range of the other VPC.
• C. Instruct the customer to set up a VPC with the same IPv4 CIDR block as that of the source VPC: 172.16.0.0/16.
• D. Instruct the customer to create a virtual private gateway to link the two VPCs.

Correct answer: C

Explanation

Configuring the customer's VPC with the same IPv4 CIDR block of 172.16.0.0/16 aligns the IP addressing schemes to meet the specified connection requirements. This configuration ensures that the Amazon EC2 instances can resolve and reach the target database private IP within the designated network scope. Other options, such as manual route table modification or establishing a virtual private gateway, do not satisfy this specific configuration prerequisite.