OSI reference Model , complete end to end internet working model.

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Accepted Answer

The OSI reference model is a 7-layer model that describes how data is transmitted over a network.

The model starts with the physical layer, which deals with the physical transmission of data.
The data link layer is responsible for error detection and correction.
The network layer handles routing and addressing.
The transport layer ensures reliable delivery of data.
The session layer manages communication sessions between applications.
The presentation layer deals with data formatting and encryption.
The application layer provides services to end-user applications.
The model allows for interoperability between different network technologies.
Example: A web browser uses the application layer to communicate with a web server over the internet.
Example: The physical layer is responsible for converting digital data into electrical signals for transmission over a network cable.
Example: The network layer uses IP addresses to route data between different networks.