| 1 |
(3) Network: sets up and maintains connections; establishes virtual circuits between computers; IP, X.25, IPX
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| 2 |
(4) Transport: provides control of quality of service; TCP, UDP, SPX, NetBEUI
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| 3 |
(5) Session: handles coordination between processes; concentrates on network management, password recognition, logon and logoff procedures, network monitoring; SNMP, FTP, SMTP, Telnet
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| 4 |
(6) Presentation: provides data formatting and code conversion, network security and file transfers; AFP
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| 5 |
(7) Application: provides user interface to lower level; X.400, X.500, FTAM
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