OSI

The OSI (Open Systems Interconnection) reference model is designed to guide implementors so that their products will work consistently with other products. It generally defines seven different layers of functions that occur at each end of a communication process. Though OSI does not always adhere strictly to keeping relative functions together, many devices involved in network telecommunication are described in association with the OSI model. The primary concept of OSI is that the communication process between two network end points can be divided into layers, with each implementing it’s own set of unique yet relative functions. Each computer program or user is equipped with these seven layers and their functions. Therefore, a flow of data will run through each layer from one computer and eventually to the end user or application. These seven layers of function are typically furnished by a combination of an operating system, applications such as a web browser, TCP/IP or similar network protocols and software and hardware that enables a signal to placed on a line attached the computer.