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Referring to the exhibit, R1 and R2 are QFX5100s and are acting as VXLAN Layer 2 Gateways for VLAN 100 using PIM-SM signaling. What will cause R2 to send a (*.G) PIM Join towards the RP?
Correct Answer: A
Explanation/Reference: Reference: https://www.juniper.net/documentation/en_US/junos/topics/concept/multicast-pim-sparse- characteristics.html Explanation: It's A because if you consider that Host B may send zero traffic whatsoever, how can Host A find Host B's MAC address? It would have to ARP for it. So, because Host B may lie dormant until Host A initiates communications, it is completely necessary for R2 to (*,G) PIM Join the VXLAN group for VLAN 100. C is impossible before the (*,G), B and D are shades of the same chicken-and-egg scenario that makes A the only viable answer.