A company is planning its cloud architecture and wants to use a VPC for each of its three products per environment in two regions, totaling 18 VPCs. The products have interdependencies, consuming serv

MPLS is a WAN technology used to connect on-premises or carrier networks and is not a native cloud VPC interconnect mechanism.

VPC peering does not support transitive routing, meaning traffic cannot flow through an intermediary VPC, making full connectivity across 18 interdependent VPCs require an unmanageable number of individual peering relationships.

Hub and spoke places a central hub VPC (often a transit gateway or VNet hub) through which all spoke VPCs route traffic, enabling transitive connectivity so any VPC can reach any other through the hub. With 18 VPCs and cross-product interdependencies, this model requires only n connections to the hub rather than the n*(n-1)/2 peering connections that full-mesh peering would need, making it far more manageable and scalable.

VPN connections are designed primarily to link on-premises networks to cloud environments over encrypted tunnels and are not the optimal solution for connecting multiple VPCs within a cloud provider.