OSI Model

OSI Model Tutorial OSI Model

Commentary Section Goal: Provide an overview of the OSI Model. Learning Objectives Learning Objective 1 After completing this section, students should be able to describe what the OSI Model is, the functionality of each its layers. 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. Section 1 - Physical Layer Section 2 - Data Layer Section 3 - Network Layer Section 4 - Transport Layer Section 5 - Session Layer Section 6 - Presentation Layer Section 7 - Application Layer

OSI Model