---
title: "Networking basics"
description: "Networking training material for Calico Cloud — fundamentals of network layers, IP addressing, routing, and the Kubernetes network model."
product: "Calico Cloud"
version: "v23.0.1"
section: "Networking"
canonical_url: "https://docs.tigera.io/calico-cloud/networking/training/"
---

# Networking basics

## [📄️Networking overview](https://docs.tigera.io/calico-cloud/networking/training/about-networking.md)

[Reference primer for networking fundamentals — OSI layers, packet anatomy, MTU, IP addressing, routing, overlays, DNS, and NAT — that underpin Calico Cloud.](https://docs.tigera.io/calico-cloud/networking/training/about-networking.md)

## [📄️Kubernetes network model](https://docs.tigera.io/calico-cloud/networking/training/about-kubernetes-networking.md)

[Reference primer for Kubernetes networking concepts that help when operating Calico Cloud — pod IPs, services, DNS, NAT outgoing, and dual stack.](https://docs.tigera.io/calico-cloud/networking/training/about-kubernetes-networking.md)