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MCTS Windows Server® 2008 R2 Complete: Study Guide by William Panek

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Understanding the OSI Model

The International Organization for Standardization (ISO) began developing the Open Systems Interconnection (OSI) reference model in 1977. OSI has since become the most widely accepted model for understanding network communication; once you understand how the OSI model works, you can use it to compare network implementations on different systems.

When you want to communicate with another person, you need to have two things in common: a communication language and a communication medium. Computer networks are no different; for communication to take place on a network composed of a variety of different network devices, both the language and the medium must be clearly defined. The OSI model (and networking models developed ...

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