GCP for DevOps — Networking

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Chapter 4 — Networking

GCP networking is built on Google’s global fiber network. Understanding Virtual Private Cloud (VPC), subnets, firewall rules, Cloud NAT, and load balancing is essential for building secure, reliable infrastructure.

What You Will Learn

  • VPC networks and subnet modes
  • Subnets, firewall rules, and routes
  • Cloud NAT for private VMs
  • Cloud Load Balancing types and configuration
  • Shared VPC and VPC Peering

Chapter Contents

# Topic Description
1 VPC Basics Creating and managing VPC networks
2 Subnets & Firewall Regional subnets and traffic control
3 Cloud NAT Internet access for private VMs
4 Cloud Load Balancing Distributing traffic at scale
5 Shared VPC & Peering Multi-project networking
6 Practice Exercises Hands-on labs

GCP Networking Architecture

┌─────────────────────────────────────────────────────────┐
│                   Google Global Network                  │
│                                                         │
│  ┌──────────────────────── VPC ────────────────────┐    │
│  │                  (Global Resource)               │    │
│  │                                                  │    │
│  │  ┌─────────────────┐    ┌─────────────────┐     │    │
│  │  │ us-central1      │    │ europe-west1     │     │    │
│  │  │ Subnet: 10.0.1.0│    │ Subnet: 10.0.2.0│     │    │
│  │  │  /24             │    │  /24             │     │    │
│  │  │  ┌────┐ ┌────┐  │    │  ┌────┐ ┌────┐  │     │    │
│  │  │  │VM-1│ │VM-2│  │    │  │VM-3│ │VM-4│  │     │    │
│  │  │  └────┘ └────┘  │    │  └────┘ └────┘  │     │    │
│  │  └─────────────────┘    └─────────────────┘     │    │
│  │           │                      │               │    │
│  │           └──── Internal Route ──┘               │    │
│  │                                                  │    │
│  │  Firewall Rules ── Cloud NAT ── Load Balancer    │    │
│  └──────────────────────────────────────────────────┘    │
│                                                         │
│  Cloud Interconnect ── Cloud VPN ── VPC Peering          │
└─────────────────────────────────────────────────────────┘

Key Concepts

Concept Scope Description
VPC Global Virtual network spanning all regions
Subnet Regional IP range within a region
Firewall rule Global (VPC) Stateful traffic control
Route Global (VPC) How traffic reaches destinations
Cloud NAT Regional Outbound internet for private VMs
Cloud Router Regional Dynamic routing (BGP)
Load Balancer Global or Regional Traffic distribution

Start with → VPC Basics

Updated:

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