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- 简答题what device sends IGMP Query messages？
- If using IGMP v1， DR selected via multicast routing protocol will send IGMP query message. If using IGMP v2，querier selected using IGMP query messages will send IGMP query messages. IGMP Query messages are sent by routers. If more than one router is attached to the subnet， the router with the lowest IP address is the querier.
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