How does IGMP elect a querier from multiple devices on a shared network segment

When a host network segment is connected to the interfaces on multiple devices, to avoid data conflict, only one device interface is allowed to send Query messages. This interface acts as the querier. The other device interfaces that run IGMP can receive to the IGMP messages on the network segment.

In IGMPv1, querier selection depends on the multicast routing protocol, such as PIM. In IGMPv2 and IGMPv3, the device interface with the lowest IP address acts as the querier on the network segment.

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