OSI stands for open system interconnection. It is used for designing network architecture. It was designed by the international standard organization ( ISO) . It provides a logical framework for data communication through computer networks. This model provides the reference but not the reality . Therefore ,OSI model is also known as OSI reference model.
The purpose of the OSI model is to open communication between different system, without requiring changes to the logic of the underlying hardware and software. The OSI model is not a protocol; it is a model for understanding and designing network architecture. It deals with the open system . An open system is one , which is open to others for the purpose of information exchange.
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