[单选] 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

微生物变异 Which three statements are possible causes for the "fltAdaptorHostIfLink-down" fault in UCS Manager？（） The fabric interconnect is in the end-host mode， and all uplink ports have failed.。 The server port to which the adapter is pinned has failed.。 A transient error has caused the link to fail.。 The fabric interconnect is in the switch mode， and all uplink ports have failed.。 The link for a network-facing host interface is missing.。人对神灵产生的宗教情感（又叫宗教经验）表现在哪些方面？已知下表所提供的资料，计算并回答问题：分批培养 In the context of MPLS，what is the correct action to be performed when an aggregate label is received ？（）

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[单选] In the context of MPLS，what is the correct action to be performed when an aggregate label is received ？（）

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