Wednesday 23 July 2014

Introduction to the OSI Model

Introduction to the OSI Model

Introduction

The first networking protocols were developed by laptop makers. every manufacturer developed its own protocols for its own platforms. Some makers even had multiple protocols, as a result of protocols were developed severally for various laptop platforms. IBM, as an example, had quite a dozen protocols back within the Sixties.

However, as you have got learned, computers and programs should use a standard protocol to speak. If many various protocols for digital communication exist, it's troublesome to link computers into common networks.

Thus, to correct the chaos of multiple protocols, laptop vendors developed communication standards, each official and de facto . one in all the foremost necessary of those is that the OSI model.

The OSI model isn't a protocol, however a reference model, or AN abstract structure that describes the functions and interactions of assorted digital communication protocols. It provides a abstract structure that helps North American nation discuss and compare network functions, even as alternative classification systems facilitate biologists or chemists mention their fields.

As a networking skilled, there ar 2 sensible reasons you want to have a solid understanding of the OSI model:

The OSI model is wide utilized in networking literature. digital communication texts structure their shows by the OSI model.

Many software package and hardware vendors use the OSI model as a guide for the event and documentation of product. after you perceive the OSI model, you'll quickly learn many various forms of networking protocols, products, and services.

Thus, the OSI model provides a logical structure to the remainder of this course, and that we can talk to it typically.

Objectives

At the top of this lesson you'll be ready to:

1.Explain why the OSI model was created

2.Name the layers of the OSI reference model

3.Describe what AN open customary is and why it advantages each vendors and customers

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