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  • Named pipe A connection used to transfer data between separate processes, usually on separate computers. Named pipes are the foundation of interprocess communications and underpin Microsoft's LAN Manager Nos.
  • Narrowcasting CATV term distinguishing cable from broadcasting, it describes the function of distributing a range of TV channels or programs designed for minority interests rather than mass appeal.
  • NCoP (Network Code of Practice) A voluntary code of practice for the design of networks covering transmission quality, safety and technical standards.
  • NetBEUI (NetBios Extended User Interface) A network device driver or transport protocol that is the transport driver supplied with LAN Manager, It can bind with as many as eight media access control drivers.
  • NetBios (Network Basic Input/Output System) Software developed by IBM that provides the interface between the PC operating system, the i/o bus, and the network. Since its design, NetBIOS has become a de facto standard.

  • NETBLT (Network Block Transfer) A Transport Level, flow controlled, bulk data transfer protocol used with TCP/IP internets. NETBLT controls the rate at which data is sent to allow a steady, high speed flow,
  • Netlogon service A LAN Manager service that implements logon security. This service verifies the usernarne and password supplied by each user logging on to the local area network. See also LAN Manager.
  • NDIS (Network Driver Interface Specification) A de facto standard interface specification developed by Microsoft to separate communications protocols from PC networking hardware. The driver can also run multiple stacks concurrently.
  • Network interface card/controller Circuitry connecting a node to a network, usually in the form of a card in a PC expansion slot. In conjunction with the nos and PC operating system it helps transmit and receive messages on the network.
  • NetView IBM's network management system. A text message-based system that monitors, manages and controls SNA networks. It is an implementation of IBM's Open Network Management Architecture. The term NetView is normally associated with the focal point of the architecture.
  • NetView/PC An implementation of IBM's NetView running on an OS/2 PC-based platform that allows non-IBM networks and equipment to be managed via an SNA network management station. NetView/PC is a service point in IBM's Open Network Management Architecture.
  • NetWare LAN Network Operating System and related products developed by Novell. There are three main product lines - NetWare 2.X (latest version 2.2) designed to run on a Intel 80286 platform and above, and NetWare 3.X (latest version NetWare 3.11), designed to run on an Intel 80386 platform and NetWare 4.0. NetWare is currently installed on more than 70 per cent of LANs worldwide.
  • Network adapter card A printed circuit board, installed in a computer, enabling the computer to join the LAN.
  • Network adapter card driver A network device driver that controls the physical function of a network adapter card.

  • Network address A group of characters that uniquely identify the location of a node on a network.
  • Network architecture The communication equipment, protocols and transmission links that constitute a network, and the methods by which they are arranged.
  • Network computing A term analogous to client/server computing.
  • Network device A computer, peripheral or other related communications equipment attached to a network.
  • Network device driver A program that enables the operating system software to communicate the network adapter cards. Also a software module running on a host or workstation that is responsible for the communications between the computer and the network or a device attached to the network.
  • Network topology The different configurations that can be adopted in building networks, such as a ring, bus, star or meshed.
  • NETS (Normes Europenne de Telecommunications) The Net program will produce a range of mandatory standards for type approval of telecommunications equipment in all EC states. Once a piece of equipment has passed its Net compliance tests, which could be undertaken in any member state, that piece of equipment can be sold in all EC countries for connection to the public network. Key Nets include: Net 1 - X.21 Access; Net 2 - X.25 Access; Net 3 - ISDN Basic Access; - Net 4 - Public Switched Telephone Network Access; and Net 5 - Primary Rate ISDN Access. Net 3 can be further subdivided into Net 3 Part 1 which corresponds to the ITU-TS Q.921 standard, and Net 3 Part 2 which is functionally equivalent to ITU-TS Q.931, but Net 3 Part is still incompletely defined.
  • Network element A piece of network equipment that can be managed through an element manager as part of a network management system.
  • Network interface The point of interconnection between a telephone network operator's communications facilities and terminal equipment, protective apparatus or wiring at a subscriber's premises. This demarcation point is on the subscriber's side of the phone company's protector or its equivalent.

  • Network Layer Level Three in the OSI stack responsible for the necessary routing and relaying through one or more networks in multiple link or wide area environments.
  • Network management The process and techniques of remotely or locally monitoring and configuring networks. Under the OSI model network management takes account of five key areas: configuration management, fault management, performance management, accounting management, and security management. A major challenge and often a headache to users because there are no complete answers today, only a patchwork of systems covering different parts of the subject. Vendors either concentrate on the physical (hardware) elements or logical (control and management of interprocess communications) sides. The ITU-TS is slowly considering standards for public networks.
  • Network management integration The highest level of network management system that brings together information from a number of Element Management Systems.
  • Network management protocol The protocol used to transfer network management NetView, and HP OpenView.
  • NEXT near-end crosstalk
  • Nodes Devices on a network that demand or supply services or where transmission paths are connected. Node is often used instead of workstation.
  • NOS (Network Operating System) The software that connects all the devices on a network so that resources can be shared efficiently and files can be transferred. It handles administration of all network functions, Network operating systems are usually in two parts; server and client/requester. The requester puts the workstation on the server machine and makes disks, software, ports and other facilities available to a node on request. Each device's services requested by a PC are accessed via the requester software.
  • NOTA (Novell Open Technology Association) A group of companies that have adopted a suggested software platform suggested by Novell that will lead to the development of a new range of CTI applications.
  • NREN (National Education and Research Network) The planned successor in the US to the connected Internet that will provide high speed access to scientific and educational institutions primarily within the US.

  • NRZI non return to zero and invert on ones
  • NSF (National Science Foundation) A US government agency that has funded the development of a cross country backbone network as well as regional networks designed to connect scientists to the Internet. It operates a US network, the National Science Foundation Network (NSFNET).
  • NSI (NASA Science Internet) A computer networking project started by NASA's Office of Space Science and Applications. It contains two major networks, Span and NSN. Also see NSN, Span
  • NSN (NASA Science Network) Using TCP/IP, NSN is part of the connected Internet.
  • Null modem cable An RS232 cable that has pins 2 and 3 reversed so that the two connected computers are under the impression they are linked using modems. It is a device that connects two DTE devices directly by emulating the Physical connections of a DCE unit.




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