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Which multicast groups support Auto-RP mapping and discovery？（）
- A、224.0.0.39
- B、224.0.1.39
- C、224.0.0.40
- D、224.0.1.40
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多选题Which two multicast protocol statements are true?（）ASparse mode multicast uses a pull model to send multicast traffic to where it is requestedBDense mode multicast uses a push model to flood traffic throughout the network and then prunes the unwanted trafficCDense mode multicast requires explicit join messa ges from their membersDSparse mode uses reverse path forwarding (RPF) to prune off redundant flowsEThe primary use of sparse mode multicast is for test labs and router performance testing
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