Inter-VPC connectivity through AWS Transit Gateway - AWS Prescriptive Guidance
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Inter-VPC connectivity through AWS Transit Gateway

The following diagram shows how you can interconnect VPCs through a transit gateway in the same AWS Region.

Connecting VPCs in the same Region

A transit gateway is a network transit hub that you can use to connect your VPCs and on-premises networks. As your organization grows, you can peer transit gateways from different AWS Regions to allow connectivity between them.