One physical circuit reaching nearly every AWS Region.
Without it, a Private VIF connects to exactly one VPC, in one Region.
1On-premises circuit
→
2Direct Connect Gateway
→
3Up to 6 Transit Gatewaysor 20 VPGs
The Transit Gateway path is what real multi-region, high-VPC-count architectures actually use — each TGW fans out to hundreds of VPCs on its own.