Tibco Software and Cisco Systems have co-designed a network delivery method called the PGM (Pragmatic General Multicast) protocol. PGM allows a server to transmit a multicast message only once. The PGM software will then ensure delivery to all of the intended recipients. This is a much-awaited improvement on the existing multicast protocol, where the server has to transmit the message to each client individually, which increases the load on the network.
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