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crosstalk (NEXT) Interference that occurs close to a connector
at either end of a cable. NEXT is usually measured near the
source of a test signal.
Nearest Active Upstream Neighbor (NAUN) A Token Ring node
from which another node receives packets and the token. Token
Ring nodes receive transmissions only from a NAUN.
negotiable BIND A Request/Response Unit (RU) that enables
two logical unit-to-logical unit (LU-LU) half sessions to
negotiate the parameters of a network session when the Lus
are activating a session.
neighboring router Two routers in the Open Shortest First
(OSPF) protocol that share a route to the same network.
NetWare A local area network (LAN)/ wide area network (WAN)
operating system from Novell that uses the NetWare Core Protocol
(NCP), Internetwork Packet Exchange (IPX), and Sequenced Packet
Exchange (SPX) protocols to share services transparently across
dissimilar platforms. NetWare servers can support DOS, Windows,
UNIX, and OS/2 clients, or Macintosh workstations. The Novell
Directory Services (NDS) feature provides a scheme for arranging
the entire network into a unified structure, as well as organizing
network resources for easy access and centralized administration
of the network.
Network Access Controller (NAC) A device that provides access
to a network either for another network or for remote callers.
network adapter Hardware installed on workstations and servers
that enables them to communicate on a network.
network address An eight-digit, hexadecimal number that uniquely
identifies a network cable segment or a unique number that
represents a network device.
network addressable unit (NAU) A logical unit (LU), physical
unit (PU), or system services control point (SSCP) that is
the origin or the destination of information transmitted through
the path control network in a Systems Network Architecture
network administration Management tasks (including assigning
addresses to devices, maintaining network data files across
a network, and setting up of internetwork routing) related
to the software and hardware connecting a network. Network
administration can also include system tasks related to server
management (including starting up and shutting down the network
system, adding or removing user accounts, and backing up and
resorting network server data).
A software product, or a combination of software and hardware,
that monitors the activity of a network and the workstations
attached to the network and provides
summaries or long-term trends of network activity and performance.
The software-hardware combination may include a Network Interface
Card (NIC) used to test the network directly.
A framework of principles that facilitates the operation,
maintenance, and growth of a communications network by isolating
user programs and applications from network details. Network
architecture includes protocols and software that help to
organize functions, data formats, and procedures for a network
system. Common network architectures include Attached Resource
Computer Network (ARCnet), Asynchronous Transfer Mode (ATM),
Ethernet, Fiber Distributed Data Interface (FDDI) and Token
network backbone A central cabling system that attaches servers
and routers on a network and handles all network traffic.
Because of its configuration (all servers connected to a central
cable), the network backbone often decreases the time needed
for transmission of packets and the amount of traffic on a
network board A circuit board installed in a NetWare network
workstation computer to allow it to communicate with other
workstations and with a NetWare server.