A.Memoryrequirementsarehigherforshareddistributiontreethanforsourcedistributiontree
B.CreatesatreefromacentralRPtoalllast-hoprouters
C.Usesarendezvouspoint
D.Anoptimalpathiscreatedbetweeneachsourcerouterandeachlast-hoprouter
E.Place（S，G）entryineachrouter’smulticastroutingtable
F.Place（*，G）entryinarouter’smulticastroutingtotable
正确答案：参考C, F
