What Is 7 Layer Network Model?
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The 7 layer network model, also known as the OSI (Open Systems Interconnection) model, is a reference model used to help define the functions of networking and communications components. The layer model is composed of seven distinct layers, which are (from lowest to highest): Physical Layer, Data Link Layer, Network Layer, Transport Layer, Session Layer, Presentation Layer, and Application Layer. Each layer plays a specific role in the networking process and provides services to the higher–level layers.