Chapter summary
Table 7-10 shows a review of the details of the Open Systems Interconnection (OSI) Model by the International Standards Organization (ISO), alongside the TCP/IP model.
Table 7-10. A quick review of the OSI Model and the TCP/IP model
Layer | OSI model | Form | Function | Devices | TCP/IP model |
|---|---|---|---|---|---|
7 | Application | Data stream | Network access for applications | Gateway function | Application |
6 | Presentation | Data stream | Data conversion into standard format, encryption, compression | ||
5 | Session | Data stream | Inter-host communications, session maintenance | ||
4 | Transport | Segment | End-to-end connection, TCP or UDP; ports | Transport | |
3 | Network | Packet or datagram | IP addressing (logical), routing | Router, packet filter firewall | Internet |
2 | Data Link | Frame | MAC address, CRC, media access | Bridge, switch, ... |
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