SUMMARY:
- A VPC peering connection is a networking connection that enables you to route traffic between two VPCs using private IP addresses
- VPC peering traffic is isolated from the Public Internet, meaning that it is a private connection
- Instances in either VPC can communicate with each other as if they are within the same network
- CIDR Blocks of the two VPCs cannot overlap
- VPCs can be in different accounts
- VPCs can be in different regions
- VPC Peering is not transitive
- There is no charge to create a VPC peering connection. However, usual charges for data transfer apply.