UDP

(uridine diphosphate): see uraciluracil
, organic base of the pyrimidine family. It was isolated from herring sperm and also produced in a laboratory in 1900–1901. When combined with the sugar ribose in a glycosidic linkage, uracil forms a derivative called uridine (a nucleoside), which in turn can be
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UDP

(biochemistry) uridine diphosphate (communications) User Datagram Protocol

UDP

User Datagram Protocol

UDP

(User Datagram Protocol) A TCP/IP protocol that is widely used for streaming audio and video, voice over IP (VoIP) and videoconferencing. UDP is considered an unreliable delivery protocol because it does not check for errors. When transmitting voice and video, there is no time to retransmit erroneous or dropped packets. In contrast, when financial and other data are transmitted, TCP is used, which does check for errors.

UDP is "connectionless" and does not use a handshake to start a session like TCP does. For example, in a broadcast session with multiple destinations, UDP does not set up a connection with each receiver beforehand. See TCP, TCP/IP and RTP.

UDP Within an Ethernet Frame

A UDP packet is framed just like a TCP packet. This shows a UDP packet in an Ethernet frame ready for transmission over the network.

The Transport Layer of TCP/IP

The transport layer of the TCP/IP protocol defines both unreliable (UDP) and reliable (TCP) delivery methods.

UDP

Acronym	Definition
UDP➣User Datagram Protocol
UDP➣Unitary Development Plan (statutory development plan for London and other metropolitan boroughs)
UDP➣United Democratic Party
UDP➣Universidad Diego Portales (Chilean university)
UDP➣Universal Datagram Protocol (Cisco)
UDP➣Uridine Diphosphate
UDP➣Universal Driver Package
UDP➣Underdrive Pulley (automotive)
UDP➣Urban Design Plan (various locations)
UDP➣Urban Development Planning
UDP➣User Defined Primitive (computer programming)
UDP➣Uridine Phosphorylase
UDP➣Urban Design Project (Buffalo, NY)
UDP➣Unit Deployment Program
UDP➣USENET Death Penalty
UDP➣Ulster Democratic Party
UDP➣Unreliable Datagram Protocol
UDP➣União Democrática Popular (Portuguese political party)
UDP➣User Diagram Protocol
UDP➣Urban Development Project
UDP➣Unified Development Process (software development)
UDP➣Unreliable Data Protocol
UDP➣Ugly Duckling Presse
UDP➣National Birth Party (Cyprus)
UDP➣Urban Dispersion Program (US DHS)
UDP➣Uridine 5'-Diphosphate
UDP➣Ubuntu Documentation Project (computer project)
UDP➣Union pour la Démocratie et le Progrès (French: Union for Democracy and Progress, Mauritania)
UDP➣User-Defined Procedure
UDP➣Undergraduate Degree Program
UDP➣Up and Down Procedure
UDP➣User Defined Process
UDP➣Umpire Development Program (umpire evaluation process)
UDP➣Universal Dialing Plan
UDP➣Unified Development Platform
UDP➣Unit Deployment Package
UDP➣Unit Deployment Plan (US DoD)
UDP➣Urbaine des Pétroles (French: Urban Petroleum; France)
UDP➣Uniform Daylight Period
UDP➣Up Down Pair (telecommunications)
UDP➣Utility Deactivation Plan