What is osi model ?
osi stands for open system interconnection .An open system is a model that allows any two
systems to communicate even if their architectures are differents
.osi models developed by international standard organization .
osi models connists of seven layers .
The layers are connected into two groups .
1 . upper layer
2 . lower layer
Differents layers of osi model .
7 . Application layer
6 . Presentation layer
5 . Session layer
4 . Transport layer
3 . Network layer
2 . Data link layer
1 . Physical layer
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