多项选择题

Which three statements about BGP confederation and route reflectors are true？（）

A.Clusters are used in confederation schemes to avoid loops.
B.BGP network can have a confederation within a route reflector area.
C.An internal BGP network cannot have a route reflector within a confederation.
D.An internal BGP network can have a route reflector within a confederation.
E.Clusters are used in route reflector schemes to avoid loops.
F.BGP network cannot have a confederation within a route reflector area.

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Which three statements about BGP confederation and route reflectors are true？ （）

Which three statements about BGP confederation and route reflectors are true？（）