Which component centralizes inter-VPC connectivity?

Which component centralizes inter-VPC connectivity?

• A. NAT gateway
• B. VPN
• C. VPC peering
• D. Transit gateway

Answer: (D)

Centralizing inter-VPC connectivity is achieved by using a transit gateway. It acts as a single hub that all VPCs and other networks (such as VPNs or on‑prem connections) attach to, so traffic between any two VPCs can flow through this common gateway. This hub-and-spoke design makes routing simpler and scales as you add more VPCs, because you don’t have to set up and manage a separate connection between every pair of VPCs. NAT gateway is focused on letting private subnets reach the internet, not on connecting VPCs to each other. A VPN connection provides a secure tunnel between networks, but by itself it doesn’t centralize connectivity across many VPCs. VPC peering connects two VPCs directly, and while it’s fine for a small, fixed number of VPCs, it doesn’t scale well to many VPCs since each new VPC would typically require new peering connections. Transit gateway avoids these limitations by serving as the unified routing point for multiple VPCs and other networks.

Centralizing inter-VPC connectivity is achieved by using a transit gateway. It acts as a single hub that all VPCs and other networks (such as VPNs or on‑prem connections) attach to, so traffic between any two VPCs can flow through this common gateway. This hub-and-spoke design makes routing simpler and scales as you add more VPCs, because you don’t have to set up and manage a separate connection between every pair of VPCs.

NAT gateway is focused on letting private subnets reach the internet, not on connecting VPCs to each other. A VPN connection provides a secure tunnel between networks, but by itself it doesn’t centralize connectivity across many VPCs. VPC peering connects two VPCs directly, and while it’s fine for a small, fixed number of VPCs, it doesn’t scale well to many VPCs since each new VPC would typically require new peering connections. Transit gateway avoids these limitations by serving as the unified routing point for multiple VPCs and other networks.