udptelnet

udptelnet.exe is a console application which you can test udp services.
udpserver.exe and udptest.exe are windows applications which you can test to listen, to connect, to send, to receive data via udp protocol between server and client.

UDP is a transport layer protocol. UDP is a connectionless and unreliable protocol. UDP does not do flow control, error control or retransmission of a bad segment. UDP is faster then TCP. UDP is commonly used for streaming audio and video . UDP never used for important documents like web-page, database information, etc. UDP transmits segments consisting of an 8-byte header. Its contains Source port, Destination port, UDP length and Checksum. UDP checksum used for detect “errors” in transmitted segment.