Hartismere School

An outstanding coeducational secondary school and sixth form college

The OSI Model Demystified


Level: Beginner
Presenter: Eli the Computer Guy
Date Created: July 9, 2010
Length of Class: 18 Minutes
Introduction to Networking
Purpose of Class
This class explains the OSI Model for technicians
Topics Covered
The OSI Model
Class Notes
Layer 7 -- Application Layer -- The layer users interact with
Layer 6 -- Presentation Layer -- Generally the layer the Operating System is on
Layer 5 -- Session Layer -- The layer that controls the communication session between two computers
Layer 4 -- Transport Layer -- The layer that controls Windowing and other tasks related to communication
Layer 3 -- Network Layer -- The layer that Routers and IP addresses operate at
Layer 2 -- Data Link Layer -- The layer that Switches, MAC Addresses and ARP reside at
Layer 1 -- Physical Layer -- The layer that cabling resides on