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| Home > OSI model: Crash Course | |
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DEFINITION OSI (Open Systems Interconnection) is a standard description or "reference model" for how messages should be transmitted between any two points in a telecommunication network. Its purpose is to guide product implementors so that their products will consistently work with other products. The reference model defines seven layers of functions that take place at each end of a communication. Although OSI is not always strictly adhered to in terms of keeping related functions together in a well-defined layer, many if not most products involved in telecommunication make an attempt to describe themselves in relation to the OSI model. It is also valuable as a single reference view of communication that furnishes everyone a common ground for education and discussion. Read the full definition here, courtesy of Whatis.com. TIPS FastFacts on the OSI model Read more OSI model-related tips here. ASK THE EXPERTS Why does the OSI model have 7 layers - no more no less? What type of security is associated with each level of the OSI model? What is the command to ping a TCP port? Ask our experts your OSI model-related questions and view previously answered Q&As. CHAPTER DOWNLOADS Understanding Layer 2, 3, and 4 protocols Read more OSI model-related white papers here.
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