U - Definitions

  • U

    U interface

    In Integrated Services Digital Network (ISDN) Basic Rate Interface service, a U interface is the electrical interface for the single twisted pair wire connection from a local phone company (the central office) to a home or business.

  • UDP (User Datagram Protocol)

    UDP (User Datagram Protocol) offers unreliable transmission of datagrams over a network that uses the Internet Protocol (IP).

  • UHF (ultrahigh frequency)

    The UHF (ultrahigh frequency) range of the radio spectrum is the band extending from 300 MHz to 3 GHz.

  • Undernet

    For terms frequently used in online keyboard chatting, see chat acronyms/IRC/BBS. According to its home page, the Undernet is the largest network of Internet Relay Channels (IRC) on the Internet.

  • unicast

    Unicast is communication between a single sender and a single receiver over a network.

  • universal network

    The "universal network" is the idea of a single network that integrates the existing voice and public telecommunications network (including the Internet), cable TV, data networks, and video broadcast networks so that they work together well.

  • Unshielded Twisted Pair (UTP)

    Unshielded twisted pair (UTP) is a ubiquitous type of copper cabling used in telephone wiring and local area networks (LANs).

  • URL (Uniform Resource Locator)

    A URL (Uniform Resource Locator) is the unique address for a resource on the internet that includes the name of the protocol and the IP address used to locate the resource.

  • Usenet

    Usenet is a collection of user-submitted notes or messages on various subjects that are posted to servers on a worldwide network.

  • USSD (Unstructured Supplementary Service Data)

    USSD (Unstructured Supplementary Service Data) is a Global System for Mobile(GSM) communication technology that is used to send text between a mobile phone and an application program in the network.

  • UUCP (UNIX-to-UNIX Copy Protocol)

    UUCP (UNIX-to-UNIX Copy Protocol) is a set of UNIX programs for copying (sending) files between different UNIX systems and for sending commands to be executed on another system.

  • Uuencode (Uuencode/Uudecode)

    Uuencode (also called Uuencode/Uudecode) is a popular utility for encoding and decoding files exchanged between users or systems in a network.

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