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What is difference between osi model and tcp model

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What is difference between osi model and tcp model 

The OSI model (Open Systems Interconnection model) and the TCP/IP model are both frameworks that describe how data is transmitted between computers over a network.

The OSI model is a theoretical model that consists of seven layers, each of which performs a specific function in the process of transmitting data. The layers are:

Physical layer: This layer deals with the physical transmission of data. It is concerned with things like cables, connectors, and the actual physical transmission of data over the network.

Data link layer: This layer is responsible for ensuring that the data is transmitted accurately from one device to another over a physical link. It is concerned with things like error correction and flow control.

Network layer: This layer is responsible for routing data between devices on a network. It determines the best path for data to take based on things like network congestion and the availability of resources.

Transport layer: This layer is responsible for providing end-to-end communication between devices. It is concerned with things like reliability and flow control.

Session layer: This layer is responsible for establishing, maintaining, and terminating connections between devices.

Presentation layer: This layer is responsible for converting data into a format that can be understood by the application layer.

Application layer: This is the top layer of the OSI model and is the interface between the network and the user. It is concerned with things like communication between applications and the sharing of resources.

The TCP/IP model, on the other hand, is a practical model that is used to implement networking protocols. It consists of four layers:

Network interface layer: This layer corresponds to the physical and data link layers of the OSI model. It is concerned with transmitting data over a physical link.

Internet layer: This layer corresponds to the network layer of the OSI model. It is responsible for routing data between devices on a network.

Transport layer: This layer corresponds to the transport layer of the OSI model. It is responsible for providing end-to-end communication between devices.

Application layer: This layer corresponds to the top three layers of the OSI model (session, presentation, and application). It is the interface between the network and the user.

In summary, the OSI model is a theoretical model that defines how data should be transmitted between devices, while the TCP/IP model is a practical model that is used to implement networking protocols.

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