# Azure Networking Concepts Overview

> Chapter 103 of the Courseiva AZ-900 curriculum — https://courseiva.com/learn/az-900/azure-networking-overview

**Official objective:** 2.3 — Azure Architecture Services

## Introduction

Chapter surveys Azure networking concepts. AZ-900 tests under 2.3.

## The Nervous System

A body's nervous system connects all parts, enabling communication. Azure networking connects resources, enabling communication within and outside Azure.

## Core explanation

Azure networking enables communication between resources and external networks. VNets, subnets, routes, and security controls form the foundation.

## Real-world context

Resources in different regions connect via peering, communicating securely without going through the public internet.

## Exam focus

Objective 2.3 expects overview of networking concepts.

## Step by step

1. **Create a VNet** — A virtual network is created.
2. **Add resources** — Resources are connected to subnets.
3. **Control traffic** — Network security groups control allowed traffic.
4. **Connect externally** — VPN or ExpressRoute connects to on-premises.

## Key takeaways

- VNets provide private network space.
- NSGs control traffic.
- Peering and gateways enable connectivity.

## FAQ

**What is Azure networking about?**

It provides private network space (VNets), controls traffic (NSGs), and enables connectivity within and outside Azure.

---

Interactive version with quiz and diagrams: https://courseiva.com/learn/az-900/azure-networking-overview