• September 21, 2005 21 Sep'05

    repeater

    In digital communication systems, a repeater is a device that receives a digital signal on an electromagnetic or optical transmission medium and regenerates the signal along the next leg of the medium.  Continue Reading

  • September 21, 2005 21 Sep'05

    multihomed

    Multihomed describes a computer host that has multiple IP addresses to connected networks.  Continue Reading

  • September 21, 2005 21 Sep'05

    AUI (attachment unit interface)

    The AUI (attachment unit interface) is the 15-pin physical connector interface between a computer's network interface card (NIC) and an Ethernet cable.  Continue Reading

  • September 21, 2005 21 Sep'05

    plesiochronous

    Plesiochronous (pronounced plee-see-AH-krun-us, from Greek plesos, meaning close, and chronos, meaning time) is an adjective that describes operations that are almost, but not quite, in synchronization - in other words, almost synchronous.  Continue Reading

  • September 21, 2005 21 Sep'05

    Point-to-Point Tunneling Protocol (PPTP)

    Point-to-Point Tunneling Protocol (PPTP) is a protocol (set of communication rules) that allows corporations to extend their own corporate network through private "tunnels" over the public Internet.  Continue Reading

  • September 21, 2005 21 Sep'05

    erbium amplifier

    An erbium amplifier, also called optical amplifier or an erbium-doped fiber amplifier or EDFA, is an optical or IR repeater that amplifies a modulated laser beam directly, without opto-electronic and electro-optical conversion.  Continue Reading

  • September 21, 2005 21 Sep'05

    active network

    An active network is a network in which the nodes are programmed to perform custom operations on the messages that pass through the node.  Continue Reading

  • September 21, 2005 21 Sep'05

    B-channel (bearer channel)

    In the Integrated Services Digital Network (ISDN), the B-channel is the channel that carries the main data.  Continue Reading

  • September 21, 2005 21 Sep'05

    ARPA (Advanced Research Projects Agency)

    An agency of the United States Department of Defense, ARPA (Advanced Research Projects Agency) underwrote development for the precursor of the Internet, known as ARPANET. Initially a modest network of four interconnected university computers, ...  Continue Reading

  • September 21, 2005 21 Sep'05

    X terminal

    An X terminal is typically a diskless computer especially designed to provide a low-cost user interface for applications that run in a network X server as part of a distributed X Window System.  Continue Reading

  • September 21, 2005 21 Sep'05

    modem doubling

    Modem doubling is an inexpensive way for a user who wants a fast Internet connection, but can only connect with an analog telephone line, to use two 56kbps modems to double their bandwidth.  Continue Reading

  • September 21, 2005 21 Sep'05

    SMDS (Switched Multimegabit Data Service)

    SMDS (Switched Multimegabit Data Service) is a public, packet-switched service aimed at enterprises that need to exchange large amounts of data with other enterprises over the wide-area network on a nonconstant or "bursty" basis.  Continue Reading

  • September 21, 2005 21 Sep'05

    DTMF (dual tone multi frequency)

    DTMF (dual tone multi frequency) is the signal to the phone company that you generate when you press an ordinary telephone's touch keys.  Continue Reading

  • September 21, 2005 21 Sep'05

    downloading

    Downloading is the transmission of a file from one computer system to another, usually smaller computer system.  Continue Reading

  • September 21, 2005 21 Sep'05

    Dialed Number Identification Service (DNIS)

    DNIS (Dialed Number Identification Service) is a telephone service that identifies for the receiver of a call the number that the caller dialed.  Continue Reading

  • September 21, 2005 21 Sep'05

    Wake on LAN

    Wake on LAN is a technology that allows a network professional to remotely power on a computer or to wake it up from sleep mode.  Continue Reading

  • September 21, 2005 21 Sep'05

    network terminator 1 (NT1)

    Using the Integrated Services Digital Network (ISDN) Basic Rate Interchange (Basic Rate Interface in ISDN) service, an NT1 (network terminating unit is a device that accepts a two-wire signal from the phone company and converts it to a four-wire ...  Continue Reading

  • September 21, 2005 21 Sep'05

    LMDS (Local Multipoint Distribution System)

    LMDS (Local Multipoint Distribution System) is a system for broadband microwave wireless transmission direct from a local antenna to homes and businesses within a line-of-sight radius, a solution to the so-called last-mile technology problem of ...  Continue Reading

  • September 21, 2005 21 Sep'05

    downstream

    This term should not be confused with downlink.  Continue Reading

  • September 21, 2005 21 Sep'05

    Address Resolution Protocol (ARP)

    Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol address (IP address) to a physical machine address that is recognized in the local network.  Continue Reading

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