HUT Comms.
Lab, Timo O. Korhonen
19
Sends data blocks with synchronization, error and flow
control for end-to-end connections*. Layer of bridges.
control for end-to-end connections*. Layer of bridges.
Transforms electrical signal into bits. In local
networks
standardized by 802.x standard. Layer or repeaters
standardized by 802.x standard. Layer or repeaters
Provides independence of applications from
differences in data presentations
differences in data presentations
User access to OSI environment applications
The OSI-functions
7.
Application
6.
Presentation
5.
Session
4.
Transport
3.
Network
2.
Data Link
1.
Physical
Establishing, managing and termination connections
(sessions) between
cooperating applications
Provides reliable, transparent data transfer for
lower level data segments or blocks
lower level data segments or blocks
Gives routing service
for transport layer.
Layer of routers.
Layer of routers.
*For instance in a classroom of workstations
