What is the recommended way to connect multiple VPCs?
The recommended way to connect multiple VPCs depends entirely on the scale of your architecture and your traffic patterns. AWS offers two primary options to manage multi-VPC networking.
1. AWS Transit Gateway (The Enterprise Choice)
For architectures with three or more VPCs, or environments that connect back to an on-premises data center via AWS Direct Connect or VPN, AWS Transit Gateway is the gold standard.
2. VPC Peering (The Point-to-Point Choice)
If you only need to connect two or three VPCs that have non-overlapping IP address ranges, VPC Peering is the most efficient and cost-effective approach.