In computer networking, the User Datagram Protocol (UDP) is one of the core members of the Internet protocol suite . With UDP, computer applications can send messages, in this case referred to as datagrams, to other hosts on an Internet Protocol (IP) network. Prior communications are not required in order to set up communication channels or paths.
UDP uses a simple connectionless communication model with a minimum of protocol mechanisms.
Source: https://en.wikipedia.org/wiki/Connectionless_communication
UDP datagram | Destination | Source | Length | Checksum | Data | | port | port | | | |
Lacks most of extra fields found in TCP segments , since it’s connectionless .