What is OSI Model?

The OSI or Open Systems Interconnection model is a type of conceptual model that standardizes and characterizes the communication functions of a computing or a telecommunicating system without any regard for the underlying technology and the internal structure. The goal of the OSI model is to exchange the operations of the diver communication systems with standard protocols for communication.

The OSI model divides the communications system into the abstraction layers. A particular layer serves the layer above and below it. The protocols for communication allow one host to communicate with the respective entity at the same layer but in another host.