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Networking is the backbone of any cloud architecture. GCP provides a software-defined networking stack built on Google's global infrastructure. This lesson covers Virtual Private Cloud (VPC) networks, subnets, firewall rules, and connectivity options.
A VPC network is a global, private network within GCP. Unlike other cloud providers, GCP VPCs are global — they are not confined to a single region.
| Property | Description |
|---|---|
| Global | A VPC spans all GCP regions automatically |
| Subnets | Regional — each subnet exists in one region |
| No IP overlap | Subnets within a VPC cannot have overlapping IP ranges |
| Default VPC | Every new project gets a default VPC with subnets in every region |
| Type | Description |
|---|---|
| Auto mode | Automatically creates one subnet in each region (default VPC) |
| Custom mode | You create subnets manually in the regions you choose (recommended for production) |
Subnets are regional — they span all zones within a region.
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