User Datagram Protocol (UDP)

A connectionless network protocol that provides simple but unreliable transmission. An alternative to TCP that does not contain error checking.

In the Internet Protocol suite, a standard, low-overhead, connectionless, host-to-host protocol that is used over packet-switched computer communications networks, and that allows an application program on one computer to send a datagram to an application program on another computer. Note: The main difference between UDP and TCP is that UDP provides connectionless service, whereas TCP does not.