A Virtual Private Cloud (VPC) is a private network interface for collections of DigitalOcean resources. VPC networks are inaccessible from the public internet and other VPC networks, and traffic on them doesn’t count against bandwidth usage. You can link VPC networks to each other using VPC peering connections (currently in early access).
Network traffic is free within a VPC network or between peered VPC networks in the same datacenter.
Bandwidth between peered VPC networks in two different datacenters costs $0.01 per GiB.