| OSI Model | ||||
|---|---|---|---|---|
| Data unit | Layer | Function | ||
|
Host
layers |
Data | 7. Application | Network process to application | Det användaren ser |
| 6. Presentation | Data representation, encryption and decryption, convert machine dependent data to machine independent data | Omvandling av data |
||
| 5. Session | Interhost communication | sessioner |
||
| Segments | 4. Transport | End-to-end connections and reliability, flow control | Portnummer |
|
| Media layers |
Packet/ Datagram | 3. Network | Path determination and logical addressing | IP adresser |
| Frame | 2. Data Link | Physical addressing | MAC |
|
| Bit | 1. Physical | Media, signal and binary transmission | Nätverkskort |
|