networking:network_layers
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Networking - Network Layers
In the OSI (Open Systems Interconnection) reference model, the communications between a computing system are split into seven different abstraction layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
One popular mnemonic, starting with Layer 7, is All People Seem To Need Data Processing.
| Layer | Description | Examples |
|---|---|---|
| 1 | Physical | Cable, RJ45 |
| 2 | Datalink | MAC, Switches |
| 3 | Network | IP, Routers |
| 4 | Transport | TCP, UDP, Port numbers |
| 5 | Session | Syn/Ack |
| 6 | Presentation | Encryption, ASCII, PNG, MIDI |
| 7 | Application | NMP, HTTP, FTP |
networking/network_layers.1606728293.txt.gz · Last modified: 2020/11/30 09:24 by peter