http://placement.freshersworld.com/power-preparation/technical-interview-questions/C-programming-answers-21419
The 7 Layers of the OSI Model
OSI Model | ||||
---|---|---|---|---|
Data unit | Layer | Function | ||
Host layers |
Data | 7. Application | Network process to application | |
6. Presentation | Data representation, encryption and decryption, convert machine dependent data to machine independent data | |||
5. Session | Interhost communication, managing sessions between applications | |||
Segments | 4. Transport | Reliable delivery of segments between points on a network. | ||
Media layers |
Packet/Datagram | 3. Network | Addressing, routing and (not necessarily reliable) delivery of datagrams between points on a network. | |
Bit/Frame | 2. Data link | A reliable direct point-to-point data connection. | ||
Bit | 1. Physical | A (not necessarily reliable) direct point-to-point data connection. |