UDP also allows two or more processes running on different hosts to communicate
Four major differences
There is no initial handshaking between the two processes and therefore no need for a welcoming socket
No streams are attached to the socket
The sending hosts create packets by attaching the IP destination address and port number to each batch of bytes it sends
The receiving process must unravel each received packet to obtain the packet's information bytes
UDP provides an unreliable transport service to its communication processes - it makes no guarantees that a datagram will reach ita ultimate destination
