Explanation
VPC peering is the correct answer because:
- VPC peering allows you to connect two VPCs together, enabling them to communicate as if they were in the same network
- It supports inter-region VPC peering, which specifically allows VPCs in different AWS Regions to connect
- It uses the existing infrastructure of the VPCs without requiring additional hardware or complex configurations
- The traffic between peered VPCs stays within the AWS network and doesn't traverse the public internet
Why the other options are incorrect:
- AWS Client VPN: This is for connecting individual users/devices to AWS resources, not for VPC-to-VPC connectivity
- AWS Direct Connect: This establishes a dedicated network connection from on-premises to AWS, not for VPC-to-VPC connections across regions
- VPC endpoints: These provide private connectivity to AWS services, not for connecting VPCs together
Key Point: For connecting VPCs across different AWS Regions, inter-region VPC peering is the appropriate service that leverages existing VPC infrastructure.