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N
network: A collection of interconnected, individually controlled computers, together with
the hardware and software used to connect them. A network allows users to
share data and peripheral devices, such as printers, and to exchange
electronic mail.
Network Interface Controller (NIC): A controller that acts as the communications
interface between a personal computer and a network.
Netware Loadable Module (NLM): A program you load and unload while the server is
running. Four types of NLMs exist: management utilities and server application
modules, disk drivers, LAN drivers, and name space NLMs.
non-interlaced: A method of refreshing a computer screen, in which each pixel of every
line is refreshed as the electron beam scans across and down the screen.
non-system disk: A disk for storing programs and files that cannot be used to start the
computer. See system disk.
non-volatile memory: Memory that retains data in the absence of an external power
source.
O
off line: Not currently connected to or under the control of the computer. Used to refer to
equipment such as disk drives and printers.
on line: A functional state in which a device is ready to receive or transmit information.
online: Available through the computer. Online may refer to information on the hard disk,
such as online documentation or online help, or a connection, through a
modem, to another computer or the Internet.
online spare: A hard disk drive used in disk mirroring and other fault tolerance techniques
to replace a failed drive without user intervention.
orphaned partitions: These occur in disk mirroring when the drive containing the master
partition fails. If a drive containing a duplicate partition fails, the system marks
the master partition as unmirrored.
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