User Datagram Protocol (UDP) is a low-latency, loss-tolerating, connectionless transport protocol. UDP is a simple protocol that allows applications to send and receive messages, known as datagrams, over the network without establishing a dedicated end-to-end connection. This makes UDP well-suited for applications that require real-time communication, such as online gaming, video conferencing, and voice over IP (VoIP). However, because UDP does not provide the same level of reliability as other transport protocols, such as TCP, it is not suitable for applications that require guaranteed delivery or error-free transmission of data. UDP is a popular protocol that is widely used in many networking applications and is supported by most operating systems.