Open Systems Interconnection Model (OSI Model)

A reference model, created by the International Organization for Standardization (ISO) that serves as an example for how computer networks should be structured. While it is not directly implemented in any major networks today, it is primarily useful as a reference for discussing the theory of Networking.

The OSI Model splits computer networking into seven layers:

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

OSI Model