UDP Protocol

Details: UDP Protocol

The UDP protocol is one of many Internet protocols used by TCP/IP which is considered a suite of Internet protocols. In this case, UDP stands for User Datagram Protocol or Universal Datagram Protocol. The UDP protocol is located in the Transport Layer of TCP/IP which is broken down into Application, Transport, Internet, and Link layers. This protocol uses a simple transmission model which isn’t necessarily reliable with duplicate, missing, or out-of-order datagram deliveries. Though less reliable than some of the other Transport protocols, the UDP protocol is often used with timeliness is more important than reliability. With its simplicity comes speedier transmissions and fewer delays. UDP is often used when error-checking isn’t necessary or is performed at the application level. The UDP protocol was first documented in 1980 under RFC 768. UDP assumes that the IP (Internet Protocol) is used as an underlying protocol. RFC 768 says right away that delivery is not guaranteed and that TCP should be used rather than the UDP protocol when reliable, ordered delivery is required. UDP is fairly straightforward with just four fields in its header: Source Port Number, Destination Port Number, Length, and Checksum. When run over IPv4, a pseudo-header is used for the checksum calculation.

Associated UDP Protocol Applications:

Internet browsers

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