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