單項(xiàng)選擇題In the context of MPLS,what is the correct action to be performed when an aggregate label is received ?()

A.It adds the VPN label into the top label in the MPLS label stack
B.It replaces the top label in the MPLS label stack with a VPN label and propagates
C.It replaces the bottom label in the MPLS label stack with a VPN label and propagates
D.It removes the top label in the MPLS label stack and does a Layer 3 lookup on underlying IP packets
E.None of above


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3.單項(xiàng)選擇題What is the default SPF throuttle timer in OSPF?()

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4.多項(xiàng)選擇題Which three choices are BGP Extended communities used in MPLS-VPN deployment?()

A.Site Of Origin SOO
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C.Route-Distinguisher
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5.單項(xiàng)選擇題When configuring Multicast VPN (MVPN) over an MPLS core, both the Default and Data MDT isconfigured under which configuration mode?()

A.router(config)#
B.router(config-if)#
C.router(config-vrf)#
D.router(config-router)#
E.router(config-router-af)#

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