Networking Definitions

This glossary explains the meaning of key words and phrases that information technology (IT) and business professionals use when discussing networking and related software products. You can find additional definitions by visiting WhatIs.com or using the search box below.

  • D

    data link control (DLC)

    DLC also is an abbreviation for digital loop carrier.

  • data link layer

    The Data-Link Layer is the protocol layer in a program that handles the moving of data in and out across a physical link in a network.

  • data plane (DP)

    The data plane (sometimes known as the user plane, forwarding plane, carrier plane or bearer plane) is the part of a network that carries user traffic.

  • data streaming

    Data streaming is the continuous transfer of data at a steady, high-speed rate. To facilitate the need for real-time analytics from disparate data sources, many companies have replaced traditional batch processing with streaming data architectures that can accommodate batch processing.

  • Data-Link layer

    The data link layer is the protocol layer in a program that handles the moving of data into and out of a physical link in a network.

  • datagram

    A datagram is, to quote the Internet's Request for Comments 1594, "a self-contained, independent entity of data carrying sufficient information to be routed from the source to the destination computer without reliance on earlier exchanges between this source and destination computer and the transporting network."

  • DCE (Distributed Computing Environment)

    In network computing, DCE (Distributed Computing Environment) is an industry-standard software technology for setting up and managing computing and data exchange in a system of distributed computers.

  • DECT (Digital Enhanced Cordless Telecommunications)

    Unlike the analog cordless phones you may have in your home, DECT (Digital Enhanced Cordless Telecommunications) is a digital wireless telephone technology that is expected to make cordless phones much more common in both businesses and homes in the future.

  • deep packet inspection (DPI)

    Deep packet inspection (DPI) is an advanced method of examining and managing network traffic.

  • delay-tolerant network

    A delay-tolerant network is a network designed to operate effectively over extreme distances such as those encountered in space communications or on an interplanetary scale... (Continued)

  • demarc (demarcation point)

    A demarc (an abbreviation for demarcation point) marks the point where communications facilities owned by one organization interface with that of another organization.

  • DEN (Directory-Enabled Networking)

    Directory-Enabled Networking (DEN) is an industry-standard initiative and specification for how to construct and store information about a network's users, applications, and data in a central directory.

  • dense wavelength division multiplexing (DWDM)

    Dense wavelength division multiplexing (DWDM) is a technology that puts together -- multiplexes -- data signals from different sources so they can share a single optical fiber pair while maintaining complete separation of the data streams.

  • device relationship management (DRM)

    Device relationship management (DRM) is enterprise software that enables the monitoring, managing, and servicing of intelligent devices over the Internet.

  • DHCP (Dynamic Host Configuration Protocol)

    DHCP (Dynamic Host Configuration Protocol) is a network management protocol used to dynamically assign an Internet Protocol (IP) address to any device, or node, on a network so they can communicate using IP.

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