OSI model in details

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The OSI model is a conceptual framework used to describe network communication.

The model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
Each layer has a specific function and communicates with adjacent layers.
The Physical layer deals with the physical transmission of data, while the Application layer deals with user interfaces.
The Transport layer ensures reliable data transfer, while the Network layer handles routing.
The Data Link layer deals with error correction and flow control.
The Session layer manages connections and sessions between applications.
The Presentation layer handles data formatting and encryption.
The OSI model is often compared to the TCP/IP model, which has 4 layers.
The OSI model is a theoretical model and is not always followed exactly in practice.

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