Regional resources are accessible by other resources only within the same region. These include the following objects:
- Addresses: Static, external IP addresses can only be used by instances that are in the same region.
- Subnets: These are associated with VPC networks and allow the assignment of IP addresses to VMs.
- Regional managed instance groups: These allow you to scale groups of instances. The scope can be set to either regions or zones.
- Regional persistent disks: These provide replicated, persistent storage to VM instances. They can also be shared between projects for the creation of snapshots and images, but not disk attachments.