Explain layers of OSI model.

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The OSI model is a conceptual framework that standardizes the functions of a communication system into seven layers.

The seven layers of the OSI model are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
Each layer has a specific function and interacts with the layers above and below it.
The Physical layer deals with the physical transmission of data.
The Data Link layer provides error-free transmission over a physical link.
The Network layer handles routing and logical addressing.
The Transport layer ensures reliable delivery of data between hosts.
The Session layer establishes, manages, and terminates connections between applications.
The Presentation layer handles data formatting, encryption, and compression.
The Application layer provides services directly to the end-user applications.
An example of the OSI model in action is when you access a website: the Application layer interacts with the user, the Transport layer ensures the data is delivered correctly, and the Physical layer transmits the data over the network.

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