An organization has 50 VPCs across 3 Regions plus on-premises networks that all need to communicate. VPC peering would create an unmanageable mesh. What provides scalable hub-and-spoke connectivity?
A.AWS Transit Gateway
Correct. TGW is AWS's hub-and-spoke transit service for scale.
B.Full-mesh VPC peering
Peering doesn't scale — it's non-transitive and meshes explode.
C.More NAT gateways
NAT provides internet egress, not interconnectivity.
D.Additional internet gateways
IGWs connect a VPC to the internet, not to each other.
Why this answer
Transit Gateway is the cloud router: VPCs, VPNs, and Direct Connect gateways attach as spokes to one hub, with route tables controlling connectivity — replacing an O(n²) peering mesh with O(n) attachments.
Correct answer: A · Last reviewed 2026-10-26
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