-> The User Datagram Protocol (UDP) is a transport layer protocol defined for use with the IP network layer protocol.
-> The service provided by UDP is an unreliable service that provides no guarantees for delivery and no protection from duplication
-> UDP provides a minimal, unreliable, best-effort, message-passing transport to applications and upper-layer protocols.
-> Compared to other transport protocols, UDP and its UDP-Lite variant are unique in that they do not establish end-to-end connections between communicating end systems.
-> UDP communication consequently does not incur connection establishment and teardown overheads and there is minimal associated end system state.
-> Because of these characteristics, UDP can offer a very efficient communication transport to some applications, but has no inherent congestion control or reliability.
-> A second unique characteristic of UDP is that it provides no inherent On many platforms, applications can send UDP datagrams at the line rate of the link interface, which is often much greater than the available path capacity, and doing so would contribute to congestion along the path, applications therefore need to be designed responsibly
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