多选题Which of the following are shared distribution tree characteristics（）AMemory requirements are higher for shared distribution tree than for source distributiontree.BCreates a tree from a central RP to all last-hoprouters.CUses a rendezvous point.DAn optimal path is created between each source router and each last-hoprouter.EPlace（S，G）entry in each router’smulticast routing table.FPlace（*，G）entry in a router’smulticast routing to table.
多选题
Which of the following are shared distribution tree characteristics（）
A
Memory requirements are higher for shared distribution tree than for source distributiontree.
B
Creates a tree from a central RP to all last-hoprouters.
C
Uses a rendezvous point.
D
An optimal path is created between each source router and each last-hoprouter.
E
Place（S，G）entry in each router’smulticast routing table.
F
Place（*，G）entry in a router’smulticast routing to table.
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