User Datagram Protocol


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user datagram protocol

[‚yüz·ər ′dad·ə‚gram ‚prōd·ə‚kȯl]
(communications)
A communications protocol providing a direct way to send and receive datagrams over an IP network but with few error recovery resources, used mainly for broadcasting over a network, for example, with streaming media.

User Datagram Protocol

(protocol)
(UDP) Internet standard network layer, transport layer and session layer protocols which provide simple but unreliable datagram services. UDP is defined in STD 6, RFC 768. It adds a checksum and additional process-to-process addressing information UDP is a connectionless protocol which, like TCP, is layered on top of IP.

UDP neither guarantees delivery nor does it require a connection. As a result it is lightweight and efficient, but all error processing and retransmission must be taken care of by the application program.

Unix manual page: udp(4).

[Postel, Jon, User Datagram Protocol, RFC 768, Network Information Center, SRI International, Menlo Park, Calif., August 1980].
References in periodicals archive ?
The term datagram can refer either to IP's NPDUs, or to the TPDUs of the User Datagram Protocol.
To address this problem, Fujitsu Laboratories has succeeded at a software-only approach, developing: 1) A new protocol that incorporates an efficient proprietarily developed retransmission method based on user datagram protocol (UDP)(2), an optimized way to deliver streaming media able to reduce latency resulting from data retransmission when packet loss occurs; 2) Control technology that addresses the problem of UDP transmissions consuming excess bandwidth by performing a real-time measurement of available network bandwidth and securing an optimal amount of communications bandwidth without overwhelming TCP's share of the bandwidth; and 3) Technology that, by employing the new protocol, makes it possible to easily speed up existing TCP applications without having to modify them.
Two main types of transport protocols are used by applications to communicate between all of their locations: User Datagram Protocol (UDP) and Transport Control Protocol (TCP).
Internet Protocol (IP), User Datagram Protocol (UDP), and Transmission Control Protocol (TCP) are basic standards for the network communication.
This paper presents a simple Matlab Simulink implementation of a communication system, based on Matlab's ability to interact with external programming languages, using MELP (Mixed-Excitation Linear Predictive) 2400bps vocoder for good audio quality at a low bit rate, AES (Advanced Encryption Standard) encryption in ECB (Electronic Code Book) Mode for communication security and User Datagram Protocol (UDP) protocol for voice communications.
Other valuable protocols supported include Address Resolution Protocol (ARP), Internet Control Message Protocol (ICMP), User Datagram Protocol (UDP) and Client Bootstrap Protocol (BOOTP).
IXXAT, for example, offers PTP protocol software that will operate independent of an operating system, and that connects to the User Datagram Protocol (UDP) socket in an Ethernet stack.
User datagram protocol (UDP) is another option for layer 4 transport.
Volumetric DDoS attack sizes peaked at 54 Gbps/18 million packets per second (Mpps) for User Datagram Protocol (UDP) floods and 8 Gbps/22 Mpps for Transmission Control Protocol (TCP)-based attacks.
Moving up the protocol stack, the next chapter describes the operation of the User Datagram Protocol (UDP) and the more common Transmission Control Protocol (TCP).
The ability to process applications reliant on user datagram protocol (UDP) enables SSL 4.
Port--(Integer input parameter)--In computer networking, a port is an application-specific or process-specific software construct serving as a communications endpoint used by Transport Layer protocols of the Internet Protocol Suite such as Transmission Control Protocol (TCP) or User Datagram Protocol (UDP).