AWS Certified Advanced Networking – Specialty (ANS-C01) — Question 144

A company has three VPCs in a single AWS Region. Each VPC contains 15 Amazon EC2 instances, and no connectivity exists between the VPCs.

The company is deploying a new application across all three VPCs. The application requires high bandwidth between the nodes. A network engineer must implement connectivity between the VPCs.

Which solution will meet these requirements with the HIGHEST throughput?

Answer options

• A. Configure a transit gateway. Attach each VPC to the transit gateway. Configure static routing in each VPC to route traffic to the transit gateway.
• B. Configure VPC peering between the three VPCs. Configure static routing to route traffic between the three VPCs.
• C. Configure a transit VPConfigure a VPN gateway in each VPCreate an AWS Site-to-Site VPN tunnel from each VPC to the transit VPUse BGP routing to route traffic between the VPCs and the transit VPC.
• D. Configure AWS Site-to-Site VPN connections between each VPC. Enable route propagation for each Site-to-Site VPN connection to route traffic between the VPCs.

Correct answer: B

Explanation

The correct answer is B because VPC peering allows for direct communication between the VPCs with high throughput, as it establishes a dedicated connection without the overhead of additional routing layers. The other options introduce additional complexity or rely on transit gateways and VPNs, which do not provide the same level of bandwidth efficiency as VPC peering in this scenario.