These three are protocols that we are using in RV messaging Service.
In earlier versions, RV was using the PGM protocol and now we are using UDP, TRDP (Tibco Realtime Distributed Protocol) protocol while sending the messages in RV.
Whenever we install the RV we need to select the protocol that we want to use. We can select PGM or UDP,TRDP.
TRDP is used for sends the acknowledgement back to the publisher in case of failures and sequence message delivery and hide the network details
