Why was the OSI developed

• Educational purpose
• To make a standard which help to vender for developed network hardware
• Making a good understanding people of networking concept
• It’s just a model which help making networking concept more depict able 
• Making Layering concept more clear than TCP/IP

    In 1984, International Organization for Standardization (ISO) developed the seven-layer model to help vendors and network administrators in such a way that they can gain a better understanding of how data is handled and transported between networking devices, as well as to provide a guideline for the implementation of new networking standards and technologies.


    ISO developed OSI Reference Model that describes how information is transferred from one networking component to another, from the point when a user enters information using a keyboard and mouse to when that information is converted to electrical or light signals transferred along a piece of wire (or radio waves transferred through the air). The OSI reference model is the primary model for network communications. The early development of LANs, MANs, and WANs was confused in many ways. The early 1980 saw great increases in the number and sizes of networks. As companies realized that they could save money and gain productivity by using networking technology, they added networks and expanded existing networks as rapidly as new network technologies and products were introduced. To assist in this process, the OSI Reference Model separates the network communication process into seven simple layers.