Question

A company operates 45 VPCs across a single AWS Region and a corporate data center connected via AWS Direct Connect. Each VPC currently needs to communicate with several others, and the networking team is struggling to manage the growing mesh of VPC peering connections and route tables. They want a scalable, centralized solution that simplifies connectivity between all VPCs and the on-premises network while supporting transitive routing. Which solution best meets these requirements?

Accepted Answer

Deploy an AWS Transit Gateway, attach all 45 VPCs and the Direct Connect gateway to it, and manage routing centrally through Transit Gateway route tables.

Answer

Create a full mesh of VPC peering connections between all 45 VPCs and add a peering connection to the Direct Connect gateway.

Answer

Use AWS PrivateLink endpoint services to expose each VPC's resources to the other VPCs and the on-premises network.

Answer

Configure a Site-to-Site VPN between each pair of VPCs and terminate the on-premises connection with a virtual private gateway on each VPC.