# Network Basics

> Understand how networks are structured and how data moves. Explore LANs, WANs, the 7 layers of the OSI model, and the TCP/IP stack.

Canonical: https://codelivly.com/rooms/network-basics
Last updated: 2026-07-01

| | |
|---|---|
| Level | Beginner |
| Category | Networking |
| Lessons | 4 |
| Estimated time | 30 min |
| XP | 200 |

Before you can analyze a packet, configure a firewall, or launch a cyber attack, you need to understand the theoretical frameworks that make network communication possible. The Network Basics & The OSI Model module strips away the complex math and focuses on how data actually travels from a web browser to a remote server.

You will learn the physical and logical boundaries of networks, including LANs, WANs, and the role of the ISP. Then, we will dissect the holy grail of networking: the 7-layer OSI model. You will learn exactly what happens at each layer, from the physical cables to the application data, and map it against the real-world TCP/IP stack.

By the end of this module, you will be able to look at any network protocol and instantly know which layer it operates on, giving you the mental framework required for the rest of your cybersecurity journey.

## Lessons

1. What is Networking (30 min)
2. The Anatomy of a Network (30 min)
3. The 7 Layers of the OSI Model (30 min)
4. The TCP/IP Stack & Data Encapsulation (30 min)

## Related

- [Learning path: Networking Fundamentals](https://codelivly.com/learning-paths/networking-fundamentals)
- [All rooms](https://codelivly.com/rooms)