UDP metrics are essentially the same as the TCP metrics, with a few exceptions.
As UDP is a connectionless protocol, the agent imposes its own connection concept.
A reply received from a UDP socket that we have recently sent a packet to is considered part of a UDP "connection." This makes it possible to define trains (seeTCP/IP) and response times in similar way as for TCP.
UDP doesn't guard against packet loss. Lost packets will go undetected as far as the network layer is concerned, so the number of retransmissions will always be zero for UDP.