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Computer Networks Tutorial

Understand how data really travels, from cables and switches to IP, TCP, DNS and HTTPS, with subnetting you can run in your browser.

32 free lessons Beginner to Advanced Covers University, GATE and CCNA-level networking (2026)

Start the first lesson

Getting Started Beginner

  1. 1Computer Networks Introduction
  2. 2Network Types & Topologies
  3. 3Network Devices
  4. 4The OSI Model
  5. 5The TCP/IP Model & Encapsulation

Physical & Data Link Layers Beginner

  1. 6Physical Layer: Media, Bandwidth & Delay
  2. 7Ethernet, Frames & MAC Addresses
  3. 8Error Detection: Parity, Checksum & CRC
  4. 9Switching & ARP
  5. 10VLANs

Network Layer Intermediate

  1. 11IPv4 Addresses, Classes & CIDR
  2. 12Subnetting Step by Step
  3. 13VLSM Step by Step
  4. 14Private Addresses & NAT
  5. 15IPv4 Header & Fragmentation
  6. 16IPv6
  7. 17Routing & Static Routes
  8. 18Distance Vector & Link State
  9. 19RIP, OSPF & BGP

Transport Layer Intermediate

  1. 20Ports, Sockets & UDP
  2. 21TCP Connections
  3. 22Flow Control & Congestion Control

Application Layer Advanced

  1. 23DNS
  2. 24DHCP
  3. 25HTTP, HTTPS & TLS
  4. 26Email, FTP & SSH

Tools, Security & Modern Networks Advanced

  1. 27ICMP & Network Tools
  2. 28Network Security Basics
  3. 29Wi-Fi, 4G & 5G
  4. 30SDN & Cloud Networking

Exam Practice & Project Project

  1. 31GATE-Style Numericals
  2. 32Project: Small Office Network

Learn Computer Networks with a mentor

Free lessons get you started. Our Computer Science Fundamentals training adds real projects and code reviews from working developers.

  • Project-based learning
  • Mentor code reviews
  • Free counselling call
Get course details +91 90532 10052