The OSI Model Objectives
	This tutorial is intended to introduce the reader to the OSI (Open Systems Interconnection) model. After completing this tutorial, the reader should have a superficial understanding of the seven layer network communications model and be aware of which protocols and services are operating on each level. A few keywords, indicated thus (not to be confused with a normal Link) have explanatory pop-up notes, which will appear when the mouse moves over them. (You should have your browser set up to enable pop-up windows, or they will not appear.) Some of the text used in this tutorial is taken, or paraphrased, from the textbook:- Tamara Dean, Network + Guide to Networks, Fourth Edition, ©2006 Delmar Learning, a part of Cengage Learning, Inc. Reproduced by permission. www.cengage.com/permissions Other sources are indicated in situ.