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Glossary : N

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collapse/expand Narrowband
  • Refers to low speed network connection that uses narrow bandwidth.

collapse/expand NAT
  • Network Address Translation. The translation from a private IP address to a public IP address or vice versa. NAT was designed to overcome the lack of IP (version 4) addresses and to represent a private network as a single entity in a public network like Internet.
    Also see IPv6.

collapse/expand NET VIEW
  • A DOS command that is used to view current network configuration and nodes' names.

collapse/expand NetBEUI
  • NetBIOS Extended User Interface. An evolution of NetBIOS that can run over routable protocols such as TCP/IP. Used in earlier network operating systems, such as Windows NT and Netware.

collapse/expand NetBIOS
  • Network Basic Input/Output System. An obsolete network protocol that is non-routable, thus can only be used within a LAN segment.

collapse/expand Network
  • A group of computers or devices that are connected to one another.

collapse/expand Network Adapter
  • The interface between a computer and a network. It functions to convert a computer message (binary stream) into electrical or optical signals for transmission across a network. It is identified in the network through its MAC address.
    Network adapter can be in the form of an NIC that is housed inside a PC, a PC Card that is inserted into a PCMCIA slot in a notebook, a CF card for PDA, or an external USB adapter. Ethernet network adapter is usually built-in in new motherboard products.
    Also see NIC and MAC address.

collapse/expand Network Layer
  • Layer 3 in the OSI model. The Network Layer is responsible to make sure that packet is sent to its destination within an acceptable time period. Routing and addressing are performed in the Network Layer. IP, IPX, AppleTalk are examples of Layer 3 protocols.
    Also see OSI model.

collapse/expand Network Neighborhood
  • Computers or servers that are connected to a computer through a LAN or an Internet connection.

collapse/expand NEXT
  • Near End Cross Talk. Crosstalk that is caused by the coupling of signals traveling in opposite directions.
    Also see crosstalk. Contrast with FEXT.

collapse/expand NIC
  • Network Interface Card. A printed circuit board that is usually inserted into a PCI slot in a computer and used for connecting a computer to a network. Most popular NIC is Ethernet card for connecting a PC to an Ethernet LAN or to a broadband modem/router. NIC operates at Layer 1 of the OSI model.

collapse/expand NLOS
  • Non Line-of-Sight. Refers to a condition in wireless communication where a signal arrives at the receiver through reflections, scattering, and diffractions.
    Also see LOS.

collapse/expand NNI
  • Network to Network Interface. The interface between networks or switches. Used in ATM and frame relay.
    Also see UNI.

collapse/expand Node
  • A computer or a device that is part of a network. Also referred to as a station.

collapse/expand Notebook
  • Portable computer. A.k.a. laptop.

collapse/expand NT
  • Network Termination. Refers to a device that is put at a subscriber site to connect a LAN or terminals to a network. Example: ISDN NT.

collapse/expand Null Modem Cable
  • An RS-232 cable that is used for direct connection between two computers through serial ports.
    Also see RS-232, serial port, and DCC.