what is multicast scoping？

【参考答案】

multicast scoping is the practice......

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问答题

What is an RPF check？

多项选择题

Refer to the exhibit. From the MAC addresses shown in the command output， to which two ports is the multicast stream 225.230.57.199 being forwarded on this switch？（）

A.Fa6/28
B.Fa7/20
C.Gi3/7
D.Fa4/2
E.Fa4/14
F.Fa4/38

单项选择题

Which statement best describes OSPF external LSAs （type 5）？（）

A.OSPF external LSAs are automatically flooded into all OSPF areas， unlike type 7 LSAs， which require that redistribution be configured.
B.External LSAs （type 5） are automatically changed to type 1 LSAs at ASBRs.
C.Type 5 LSAs are route summaries describing routes to networks outside the OSPF Autonomous System.
D.External network LSAs （type 5） redistributed from other routing protocols into OSPF are not permitted to flood into a stub area.