Network - User Datagram (UDP)
About
UDP is a User Datagram Protocol
It establishes connections that are:
- low-latency
- data loss-tolerant
It emphasizes reduced latency over reliability. For a reliable data stream, see TCP.
UDP is connectionless. See UDP - (Datagram|Connectionless) Socket (Endpoint)
It improves the latency by enabling the transfer of data before an agreement is provided by the receiving party.
The U implies less reliable data transmission than TCP connections.
You may have trouble sending large amounts of data that way, but it's still a useful capability to have.