Networking Essentials / Network foundations
Lesson 3 of 30
The OSI model
The OSI model splits networking into seven layers, from physical cables (1) to applications (7). It gives everyone a shared way to describe where a problem is.
Key points
- 1 Physical, 2 Data link, 3 Network, 4 Transport
- 5 Session, 6 Presentation, 7 Application
- IP is layer 3, TCP is layer 4
Quiz · +10 XP
Which OSI layer does IP work at?
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