VPC

VPC is virtual private cloud

VPC is a logical private data center

VPC needs Internet Gateway(IGW), Route tables, Network ACLs, Subnets, Security Groups

1 subnet = 1 Availability zone  (AZ)

You can peer VPC to another VPC, even within different AWS accouts.

VPC A is peered to VPC B, VPC A is peered to VPC C, BUT VPC B is NOT PEERED to VPC C