Abstract
This chapter discusses the Open System Interconnection (OSI) Model. OSI model is nothing more than a reference model to help guide the development of new protocols and applications. International Standards Organization created the OSI model. Originally, it was developed as a protocol stack with the intentions that it would become widely used. It was designed to be vendor neutral and cross-compatible between operating systems. OSI never did take off as a protocol but in time became a model used to help describe what should occur at each layer. The model allows programmers to focus on how their program will talk to the network portion of the stack. This saves the programmer work, and it keeps the industry from having a whole bunch of proprietary network protocols that are based strictly on a certain application. As long as vendors base their applications on the OSI model, existing protocol stacks can be used and software integration will be possible with other vendors.
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