Computer Networking
How the internet really works.
Layer by layer, top-down: HTTP to Ethernet, WiFi to security.
Unit 1
The layered network
Top-down layering and the OSI model
Unit 2The application layer
HTTP, DNS, email, and CDNs
Unit 3The transport layer
TCP, UDP, flow control, and congestion
Unit 4The network layer
IP addressing, routing, and routers
Unit 5The link layer
Ethernet, switching, and MAC protocols
Unit 6Wireless networks
WiFi, cellular, and mobility
Unit 7Network security
Encryption, TLS, firewalls, and common attacks
Unit 8Multimedia
Streaming, voice, and video networking
Unit 9Network management
Operations, software-defined networking, and the modern internet