2.2. Identifying the Seven Layers of the OSI Model and Their Functions

To understand anything and then develop it you need a way to relate to it, and computer communication is no exception. As computer communication became a reality, we needed a common language that we could use to communicate about computer communication. In the early 1980s representatives from over 60 countries, collectively known as the International Standards Organization (ISO), decided on and developed a model of communication upon which hardware and software could be developed and connected. They named the model the Open System Interconnection (OSI) model and then began to use it to create new hardware and software.

Initially, the OSI model was supposed to include an OSI ...

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