الجمعة، 5 يونيو 2015

network models 1

network models


(What is OSI (open system interconnection  model

OSI model models created by ISO (international standards organization





 Application
Preparing data & supporting application services

Presentation
Encrypt & decrypt data to be sent across a network

Session
Establish , manage and terminate connections between applications

 Transport
Segmentation data , sequencing , flow control , error detection , error correction and
Acknowledgments  

Network (set ip addressing  and make data segmentation )
Create a logical paths for transmitting data from node to node , including switching , routing , and forwarding .

Datalink
Set  mac addressing and packet data and determine logical link control


Physical :
Conveys the bit stream

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