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.

  • F

    Floodlight

    Floodlight is a Java-based OpenFlow controller.

  • flow routing

    Flow routing is a network routing technology that takes variations in the flow of data into account to increase routing efficiency... (Continued)

  • FlowVisor

    FlowVisor is an experimental software-defined networking controller that enables network virtualization by slicing a physical network into multiple logical networks.

  • foreign agent

    In Mobile Internet Protocol (Mobile IP), a foreign agent is a router serving as a mobility agent for a mobile node.

  • foreign network

    In the Mobile Internet Protocol (Mobile IP), a foreign network is any network other than the home network to which a mobile device may be connected.

  • forest-and-tree model

    The forest-and-tree model is a logical structure for interconnecting multiple network domains in Windows 2000 and later operating systems.

  • forklift upgrade

    Forklift upgrade is industry slang for replacing or significantly upgrading an IT infrastructure. IT transformation is a more formal way to describe the same concept.

  • Forward DNS lookup

    Forward DNS lookup is using an Internet domain name to find an IP address.

  • four-way server

    A four-way server is a server that incorporates a multi-core processor for increased performance... (Continued)

  • fractional T1

    A fractional T1 or T3 line is a T1 or T3 digital phone line in the North American T-carrier system that is leased to a customer at a fraction of its data-carrying capacity and at a correspondingly lower cost.

  • FRAD (frame relay access device or frame relay assembler/dissembler)

    A FRAD (frame relay access device; also sometimes referred to as a frame relay assembler/dissembler) is a box that encapsulates (puts frame relay header and trailer information on) outgoing data packets and decapsulates (removes frame relay headers and trailers from) incoming packets.

  • frame

    See frames for the use of multiple Web pages on a single display screen.

  • frame rate

    In motion pictures, television, and in computer video displays, the frame rate is the number of frames or images that are projected or displayed per second.

  • Freephone

    In the U.K., Freephone is a type of Number Translation Service (NTS) that allows a phone user to call a non-geographic number beginning with 0800 or 0500 without incurring a charge.

  • frequency modulation (FM)

    Also see modulation and frequency-shift keying (FSK).

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