The full form of UDP is User Datagram Protocol. It is a communication protocol used for sending and receiving data over the internet.
UDP is a lightweight, connectionless protocol that operates at the Transport layer of the Internet Protocol (IP) suite. Unlike TCP (Transmission Control Protocol), which guarantees delivery of data, UDP does not provide any guarantees regarding delivery or sequencing of packets. Instead, UDP is often used for applications that require faster data transfer, such as video streaming or online gaming, where small amounts of lost data are acceptable.
The "User Datagram" part of the name refers to the fact that UDP sends data in the form of datagrams, which are discrete chunks of data that are sent as individual packets. The "Protocol" part of the name indicates that UDP is a set of rules and procedures that govern how data is transmitted and received over a network.
In summary, UDP is a fast and lightweight protocol used for sending data over the internet. Its name reflects the fact that it operates using datagrams and is a protocol for communication.