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多項(xiàng)選擇題

Which two features prevent routing loops between the OSPF sites of a customer when the sites aremultihomed or a backdoor link is used between the sites？（）

A.sham link
B.down bit
C.virtual link
D.Site of Origin
E.domain tag

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單項(xiàng)選擇題
In which Cisco IOS configuration mode is the route distinguisher （RD） configured？（）
A.R1（config-route-at）#
B.R1（config-route-map）#
C.R1（config-it）#
D.R1（config-vrf）#
E.R1（config）#
F.R1（router）#
多項(xiàng)選擇題
Which two statements about MPLS point-to-multipoint traffic engineering （P2MP TE） are true？（）
A.P2MP TE uses an OSPF extension that is different from the OSPF extension that is used in P2P TE
B.Loose path is not supported in P2MP TE
C.Multiple IP multicast groups can map to one P2MP tunnel
D.Affinity is not supported in P2MP TE
E.P2MP TE uses Constrained Shortest Path First （CSPF） to calculate paths