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单选题
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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更多 “单选题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 stackB It replaces the top label in the MPLS label stack with a VPN label and propagatesC It replaces the bottom label in the MPLS label stack with a VPN label and propagatesD It removes the top label in the MPLS label stack and does a Layer 3 lookup on underlying IP packetsE None of above” 相关考题
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单选题The correct meaning of a lexical item in a given context is _____.A
the one provided in a dictionaryB
the one which best fits the contextC
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单选题What is the action of "pop" in the context of MPLS switching？（）A
It removes the top label in the MPLS label stack.B
It adds a top label in MPLS label stack.C
It replaces the top label in the MPLS label stack with another value.D
It replaces the top label in the MPLS label stack with a set of labels.E
None of above.
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单选题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 stackB
It replaces the top label in the MPLS label stack with a VPN label and propagatesC
It replaces the bottom label in the MPLS label stack with a VPN label and propagatesD
It removes the top label in the MPLS label stack and does a Layer 3 lookup on underlying IP packetsE
None of above
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