What is the function of Amazon VPC Peering?

Amazon VPC Peering is designed specifically to facilitate private traffic routing between Virtual Private Clouds (VPCs). This feature allows for the creation of a direct network route between two VPCs, enabling resources in the VPCs to communicate with each other as if they are part of the same network. With VPC Peering, traffic flows directly between the two VPCs without the need for public internet, VPN, or AWS Transit Gateway, enhancing both security and performance.

The establishment of a peering connection is highly advantageous for organizations that want to share resources across multiple VPCs while maintaining a secure and efficient communication channel. It allows for unrestricted data transfer between the peered VPCs, making it easy to share services and applications without exposing them to the public internet.

The other options, while important in different contexts, do not directly describe the primary function of VPC Peering. For instance, enhancing security can be a secondary effect of traffic routing through private connections, and managing access to AWS services or isolating network outages are not functions associated with VPC Peering itself.