OSI Layer

The OSI Model:

The OSI model was developed by the International Standards Organization (ISO) as a reference model to provide a framework for defining how a network handles data packets.

Few network protocols tightly follow the OSI model, but vendors still use it as a blueprint when developing network hardware and software.

Layer Name Layer Number

Application 7

Presentation 6

Session 5

Transport 4

Network 3

Data Link 2

Physical 1