UDP multicast is a networking technique used to efficiently send data to a group of interested recipients on an IP network. Instead of sending individual copies of the data to each recipient (unicast) or broadcasting to the entire network, multicast sends a single copy to a specific multicast group address. Network devices like routers then intelligently forward the data only to those network segments where members of the multicast group are present. This significantly reduces network traffic and server load, making it ideal for applications like video streaming, online gaming, and distributing stock quotes where the same data needs to reach multiple clients simultaneously.
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