OSI Model Tutorial
Section Goal: Provide an overview of the OSI Model.
The Open System Interconnection (OSI) Model was created by the International Organization for Standardization (ISO) in the earlier 1980s. The reason this model was created was to allow software and computers to be able to communicate from around the world. By creating OSI compliant networking hardware, companies can be assured that their products will be able to communicate with hardware from other companies.
The OSI Model is made-up of seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application layer.
This graphic is taken from The Abdus Salam International Centre for Theoretical Physics.