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单项选择题 Refer to the exhibit. Router E learned about the PIM RP （designated as 7.7.7.7） from four different sources. Routers A and D advertised the 7.0.0.0 network via EIGRP. Routers B and C advertised the 7.0.0.0 network via OSPF. Considering that all four Ethernet interfaces on router E could potentially lead back to the PIM-RP， when router E receives the first multicast packet down the shared tree， which incoming interface will be used to successfully pass the RPF check？（）

A、E0

B、E1

C、E2

D、E3

E、None of these interfaces will be used to successfully pass the RPF check

F、All of these interfaces would successfully pass the RPF check

  • A

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