OSI Model vs TCPIP
The Open Systems Interconnection (OSI) model and the Transmission Control Protocol/Internet Protocol (TCP/IP) model are both conceptual frameworks that describe how data is transmitted over a network. However, they differ in their structure and purpose.
OSI Model
The OSI model is a seven-layer model that was developed by the International Organization for Standardization (ISO) in the 1980s. It is a reference model, which means that it is not a specification for any particular implementation. The OSI model is intended to be a general framework for understanding and designing communication systems.
TCP/IP Model
The TCP/IP model is a four-layer model that was developed by the U.S. Department of Defense in the 1970s. It is a de facto standard, which means that it is widely used but not formally standardized. The TCP/IP model is more practical than the OSI model, and it is the basis for most modern Internet communication.
| Layer | OSI Model | TCP/IP Model (DoD Model) |
|---|---|---|
| Application | Application, Presentation, Session | Application |
| Transport | Transport | Transport |
| Network | Network | Internet |
| Data Link | Data Link | Network Access, Data Link |
| Physical | Physical | Physical |
The following table provides the differences between the OSI model and TCP IP Models:
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