Thursday, December 9, 2021

Comparison of OSI Model and TCP/IP Model | Difference between OSI Model and TCP/IP Model | OSI Model vs TCP/IP Model


Introduction of OSI Model

OSI Model developed by ISO (International Organizations for Standardization). OSI stands for Open System Interconnection. There are seven layers in this model. OSI Model is developed after TCP/IP Model.

OSI model provides following services: 1-Provides peer-to-peer logical services with layer physical implementation. 2-Provides standards for communication between system. 3-Define point of interconnection for the exchange of information between system. 4-Each layer should perform a well-defined function.

Introduction of TCP/IP Model

The internet architecture, which is also sometimes called the TCP/IP architecture its two main protocols. It stands for Transmission Control Protocol/Internet Protocol.

TCP/IP is four-layer system. Layers of TCP/IP are Application layer, Transport layer, Internet layer and Host to network layer. Host to network layer is called physical and data-link layer in OSI model. Internet layer is called network layer in OSI model. The application layer in TCP/IP model is combination of application, presentation and session layer of OSI model.

TCP is connection-oriented protocol and IP is connectionless protocol. Application program sends data to the transport layer protocols TCP and UDP. Routing of packet takes place in internet layer. Transmitting IP datagram using host to network protocol. TCP/IP model does not define any specific protocol in host to network layer.

Comparison of OSI Model and TCP/IP Model

Figure: Comparison of OSI and TCP/IP Model

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