Question

A company has many VPCs in various accounts, that need to be connected in a star network with one another and connected with on-premises networks through Direct Connect. What do you recommend?

a) Use AWS Transit Gateway
b) Set up VPC peering connections
c) Establish VPN connections for each VPC
d) Utilize AWS Direct Connect for each VPC

Answer 1

For interconnecting multiple VPCs and on-premises networks, it is recommended to use AWS Transit Gateway to establish a central hub for a scalable and efficient network architecture.

Step-by-step explanation:

For a scenario involving multiple VPCs across various accounts that need to be interconnected, and also connected to on-premises networks through AWS Direct Connect, the most recommended solution is to use AWS Transit Gateway.

The AWS Transit Gateway acts as a cloud router, simplifying the network and offering a single point of management and connection. It provides a hub-and-spoke (star network) connection model, which is scalable and reduces the complexity involved with managing multiple connections. With Transit Gateway, you can connect VPCs, data centers, and remote offices to a central gateway, handling high volumes of traffic and routes.

Setting up individual VPC peering connections for many VPCs is complex and non-scalable. Establishing individual VPN connections for each VPC would not take advantage of the AWS Direct Connect's high-speed connectivity. Utilizing AWS Direct Connect for each VPC, while feasible, is costly and less efficient than going through a Transit Gateway.