The Open Systems Interconnection (OSI) Model is a conceptual model that characterizes and standardizes the internal workings of a computer network. Developed in the 1970s, the OSI Model is a layered model that defines a networking framework for implementing protocols in seven layers.

The OSI Model is a reference model, meaning that it provides a framework for discussing network operations but does not prescribe how networks should be designed or implemented. Network designers and administrators use the OSI Model to understand the functions of individual network components and to troubleshoot and optimize network performance.

The OSI Model is divided into …