Computer Networking
How computers talk: IP addresses, the OSI layers, packets and routing, TCP/UDP, DNS, HTTP and TLS, NAT, firewalls, and sockets. Build network logic in Python.
Every lesson runs real code in your browser, checked the moment you submit. No installing anything, no setup, no waiting.
Start Computer Networking freeWhat this course covers
- What is a Network?
- The Internet: A Network of Networks
- The OSI and TCP/IP Layers
- IP Addresses
- Subnets and CIDR
- MAC Addresses, Switches and Routers
- Packets and Routing
- TCP vs UDP
- Ports and Sockets
- The TCP 3-Way Handshake
- DNS: Names to Numbers
- HTTP and HTTPS
- TLS: How HTTPS Stays Private
- NAT and Private Networks
- DHCP: Automatic Addresses
- Routing Tables
- Firewalls and Network Security
- VPNs: Private Tunnels
- Network Tools
- Wi-Fi and Wireless Networking
- IPv6: The Next Generation
- Network Troubleshooting Workflow
- Sockets in Python (Capstone)
Other courses
Learn to think like a problem-solver before you write a single line of code. Break big …
Your first Python course, no experience needed. Learn variables, loops, functions, and …
Level up your Python with comprehensions, lambdas, error handling, files, modules, and …
Master OOP in Python: classes, objects, inheritance, polymorphism, encapsulation, abstr…
Build your own 2D games from scratch: the game loop, sprites, movement, collisions, and…
Go deeper in Python: decorators, generators, type hints, regex, JSON, SQLite, testing, …
Core CS: arrays, lists, stacks, queues, hash tables, trees, graphs, sorting, searching,…
Learn Java from zero, with no programming background needed. Write your first program, …
Learn Rust from zero, with no systems background needed. Write your first program, then…
Learn C# from zero, with no programming background needed. Write your first program, th…
Learn C++ from zero, with no programming background needed. Start with your first progr…
Learn C from zero, with no programming background needed. The language that Unix, Linux…