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Network operating system - Definition and Overview |
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Network operating system (NOS): Software that (a) controls a network and its message (e.g. packet) traffic and queues, (b) controls access by multiple users to network resources such as files, and (c) provides for certain administrative functions, including security.
Note 1: A network operating system is most frequently used with local area networks and wide area networks, but could also have application to larger network systems.
Note 2: The upper 5 layers of the OSI-Reference Model provide the foundation upon which many network operating systems are based.
Source: from Federal Standard 1037C
'NOS was also the name of a proprietary operating system on the CDC Cyber mainframe; in the early 1980s it was replaced by NOS/VE.
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