DigitalOcean Virtual Private Cloud — an isolated private network within a DigitalOcean region that allows Droplets and managed services to communicate securely using private IP addresses, isolated from the public internet and from other customers' networks.
A healthcare company places all backend Droplets and their Managed PostgreSQL database inside a VPC. The database has no public IP address and is only reachable via private VPC networking from authorized application servers — meeting HIPAA network isolation requirements.