Audit Information systems & IT Security
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Audit Information systems & and IT Security

Information System audit and IT Security

Definitions and Terminology

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Open Systems Interconnection


(OSI) Reference Model The seven-layer ISO-OSI model was created in 1983 to be a universal reference model that could be applied to any computing environment to conceptually describe how two computer processors transmit data between themselves. The seven layers, from the top down, are: application, presentation, session, transport, network, data link, physical.

source: Champlain, Auditing Information Systems:2003


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