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| Layer | Functions |
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| 7 - Application | Interface to the Host O/S, User Accounting and Security, O/S Services |
| 6 - Presentation | Compression/Decompression, Encryption/Decryption, ASCII/EBCDIC Translations, Data Reformating |
| 5 - Session | Multiplexing, Initiation, Management and Termination of Sessions |
| 4 - Transport | Data Handling, End-to-End Reliability |
| 3 - Network | Packets: Addressing, Subnet Accounting |
| 2 - Data Link | Frames: Node-to-Node Reliability |
| 1 - Physical | Bits: Connector, Voltages, Pins |
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Last Update: 24/11/98 | Web Author: Geoff May |
| Copyright © 1997, 1998 by Network Business Services Pty Ltd. All Rights Reserved. | ||