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Why is the OSI reference model important and how does the TCP/IP suite relate to it.?

April 26, 2017Computer Computers internet model networking OSI Reference TCP

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Why is the OSI reference model important and how does the TCP/IP suite relate to it.?

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Short answer: The OSI model is a theoretical model of networking, splitting the important functions of sending data across a network into layers to compartmentalise them and make it easier for networking to remain vendor-neutral. The TCP/IP suite has a similar model, although it has fewer layers. The laters of the OSI model are: Application Presentation Session Transport Network Datalink – LLC (Loginal Link Control) – MAC (Media Access Control) Physical From a network hardware point of view, layers 1-3 are the most important. Typically, routers operate at Layer 3 and switches at layer 2. The TCP/IP model has 4 layers: Application Transport Internetwork Network Access The following diagram shows how the OSI and TCP/IP models pair up: http://www.thebryantadvantage.com/images/OSI%20TCP%20Model%20Comparison.jpg For most info on the OSI model: http://en.wikipedia.org/wiki/OSI_model TCP/IP model: http://en.wikipedia.