Redirected from UDP
As a stateless protocol it is often used in such applications where data must arrive quickly, and data that arrives late is worthless. The benefit of this smaller feature set is quicker data transmittal, and lower total overhead, hence its common usage is for real time applications like videoconferencing, online gaming, voice over IP and other streaming media.
UDP packets (also known as datagrams) contain, in addition to the lower level headers, a UDP header, which consists of a checksum, the packet length, plus source, and destination ports.
In special circumstances, UDP, combined with application-level connection and reliability management, provides one useful advantage over TCP: the ability to hold connections to thousands of users at once, unrestricted by limitations on TCP hard-coded into an operating system's often proprietary kernel.