Introduction to Computer Networking Personal notes on the Introduction to Computer Networking course from Standard. 1. The Internet and IP 1.1. Networked Applications 1.2. The 4 Layer Internet Model 1.3. The IP Service Model 1.4. Life of a Packet 1.5. The Principle of Packet Switching 1.6. Layering Principle 1.7. Encapsulation Principle