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OSI Model Full Form

What Is The Full Form Of OSI Model?

The Full Form Of OSI Model is a Open Systems Interconnection

The OSI is a model that defines the communication duties of a computing system without consideration to its underlying internal structure and technology. This model was produced by the International Organization for Standardization (ISO) in 1984. It is a reference model for how applications communicate over a network.

The OSI model can be recognized as a common language for computer networking. It divides into 7 abstract layers:

Layers of OSI Model

  1. The Physical Layer
  2. The Data Link Layer
  3. The Network Layer
  4. The Transport Layer
  5. The Session Layer
  6. The Presentation Layer
  7. The Application Layer


  • It is the theoretical model which facilitates the different communication methods to communicate utilizing the network.
  • Taking the whole responsibility to transfer the data packets between network devices.
  • It comprises seven layers, and each layer works independently to achieve desirable results.


  • The best part about this model is, it includes seven layers, and these layers are independent. And thus, shifts in one layer do not affect the other layers.
  • It is secure and flexible.
  • It has the ability to deal with both connectionless and connection-oriented services.
  • Designing, development and maintenance of the software is easy because the model split the communication process into small sections.


  • At times, the whole process becomes too complicated.
  • The initial implementation is slow and expensive.
  • It is completely a hypothetical model and overlooks the presence of devices and technologies. Hence, its practical implementation is somewhat restrained.


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