T171 - OSI 7 Layer Model
The the following table shows the function of the seven layers:
|
Layer |
Function |
Physical |
Converts the data into the stream of electric or analogue pulses that will actually cross the transmission medium and oversees the transmission of the data. |
Data Link |
Provides an interface with the network adapter; maintains logical links for the subnet. |
Network |
Supports logical addressing and routing. |
Transport |
Provides error checking and flow control for the internetwork. |
Session |
Establishes sessions between communicating applications on the communicating computers. |
Presentation |
Translates data to standard format; manages encryption and data compression. |
Application |
Provides a network interface for applications; supports network applications for file transfer, communications, and so forth. |