Also read IP Addressing in GCP and Firewall Rules in GCP

Zones and Regions 

A subnet in GCP can span across multiple zones and multiple regions.

When you deploy VMs that live in different zones (as you should for increased availability)

Multi Zone for Increased Availability

multi zones for availability
multi zones for availability

Multi Region for Disaster Scenarios

egress charges google cloud

multi regions gcp
multi regions gcp
egress charges google cloud
egress charges google cloud

Summary 

Multi zone deployments and multi region deployments in GCP are easy to build. However, often, the charges associated with such deployments are miscalculated or misunderstood. If your regions are outside the U.S., there can be a substantial component to the U.S. to International region egress charges.




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