What is OSI model .explain layers of OSI model

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The OSI model is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system.

OSI stands for Open Systems Interconnection.
It has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
Each layer has a specific function and communicates with the adjacent layers.
The Physical layer deals with the physical transmission of data.
The Data Link layer provides error-free transfer of data frames between nodes.
The Network layer handles routing and logical addressing.
The Transport layer provides reliable end-to-end data delivery.
The Session layer establishes, manages, and terminates sessions between applications.
The Presentation layer deals with data representation and encryption.
The Application layer provides services to end-user applications.

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