AWS Certified Advanced Networking – Specialty (ANS-C01) — Question 246

A company deployed an application in two AWS Regions in one AWS account. The company has one VPC in each Region. The VPCs use non-overlapping private CIDR ranges.

The company needs to connect both VPCs to a single on-premises data center to test the application. The application requires up to 800 Mbps of throughput. A network engineer needs to establish connectivity between the VPCs and the on-premises data center.

Which solution will meet this requirement with the LEAST operational overhead?

Answer options

• A. Order a 2 Gbps Direct Connect connection for the data center. Configure a virtual private gateway in each VPC. Create a private VIF for each virtual private gateway, and associate the virtual private gateways with the Direct Connect connection. Configure static routes in the VPC route tables and in the data center router.
• B. Order a 2 Gbps Direct Connect connection for the data center. Configure a virtual private gateway in each VPC. Create a private VIF for each virtual private gateway, and associate the virtual private gateways with the Direct Connect connection. Configure Open Shortest Path First (OSPF) routing between the private VIF and the data center.
• C. Configure a customer gateway and a virtual private gateway in each VPConfigure an AWS Site-to-Site VPN connection between the data center and each VPConfigure static routes in each VPC route table to point to the subnets in the data center.
• D. Configure a customer gateway and a virtual private gateway in each VPC. Configure an AWS Site-to-Site VPN connection between the data center and each VPC. Configure BGP routing between the VPCs and the data center.

Correct answer: D

Explanation

Option D is correct as it utilizes BGP routing, which is well-suited for dynamic routing and provides better management of multiple connections, ensuring high availability and redundancy. Options A and B involve Direct Connect, which is more complex and requires static routing or OSPF, adding operational overhead. Option C uses static routing as well, which is less efficient for managing multiple connections between two VPCs and a data center.