Explain the OSI Model

The OSI (Open Systems Interconnection) Model is a reference model for how applications can communicate over a network.

The main concept of OSI is that the process of communication between two endpoints in a network can be divided into seven distinct groups of related functions, or layers.

The seven layers of function are provided by a combination of applications, operating systems, network card device drivers and networking hardware that enable a system to put a signal on a network cable or out over Wi-Fi.

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1 Physical, 2Data Link, 3Network, 4Transport, 5Session, 6Presentation, 7Application

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7Application, 6Presentation, 5Session, 4Transport, 3Network, 2Data Link, 1Physical

 

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