What Is Osi Model?
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The OSI (Open Systems Interconnection) model is a seven-layer network model developed by the International Organization for Standardization (ISO) in 1984. It is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system, without regard to their underlying internal structure and technology. The model is a product of standardization, which allows different networks to interoperate. The OSI model breaks network communication into seven layers. Each layer serves a specific purpose and works with the layer above and below it to ensure the proper flow of information between two endpoints. The layers are as follows:
• Layer 7: Application
• Layer 6: Presentation
• Layer 5: Session
• Layer 4: Transport
• Layer 3: Network
• Layer 2: Data Link
• Layer 1: Physical