# User Datagram Protocol (UDP)Last edited: 2024-05-22User Datagram Protocol (UDP)This is a layer 4 protocol that optimises for simplicity over reliability. This is defined it RFC768 The header that gets attached includes:source port ,destination port ,length of the header, andchecksum of the data. This tends to be used in applications that are latency sensitive or have small number of messages to send.
This tends to be used in applications that are latency sensitive or have small number of messages to send.