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What is “multicasting IGMP snooping”?
IGMP snooping is the process of listening to Internet Group Management Protocol (IGMP) network traffic. The feature allows a network switch to listen in on the IGMP conversation between hosts and switch. By listening to these conversations the switch maintains a map which links need IP multicast streams. Multicasts may be filtered from the links which are unnecessary and thus control which ports receive specific multicast traffic.
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