OSI and DoD TCP/IP models, layer roles and packet architecture

What this note covers

1. Why networking uses layered models
2. The seven OSI layers and their roles
3. The DoD TCP/IP model and comparing the two models
4. Encapsulation and packet architecture
5. MAC addresses and layer 2 switching
6. IP addresses and layer 3 routing
7. Features of TCP/IP and exam technique for model questions

7 sections · 11 key terms & formulas · 6 common mistakes