This interactive lesson describes the Open Systems Interconnection (OSI) model, a networking framework that characterises how information from a software application in one computer moves through a network to a software application in another computer. The OSI model breaks the flow of data down into seven layers: the physical layer, the presentation layer, the session layer, the transport layer, the network layer, the data link layer, and the physical layer.

This interactive lesson was made possible by funding from National Science Foundation Grant # DUE 1601612 at Brookdale Community College in Lincroft, New Jersey – PI Mike Qaissaunee, with contributions from Dr. John Sands & Susan Sands of Moraine Valley Community College and Jaime Mahoney of Bunker Hill Community College.

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