Multicast is a network addressing method for the delivery of information to a group of destinations simultaneously using the most efficient strategy to deliver the messages over each link of the network only once, creating copies only when the links to the multiple destinations split (typically network switches and routers). However, like the User Datagram Protocol, multicast does not guarantee the delivery of a message stream.
Multicast is a networking approach for delivering information to multiple recipients simultaneously. It sends messages efficiently across network links without duplication until it reaches its destinations (typically via switches and routers), but like the User Datagram Protocol, it doesn't guarantee message transmission.