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单选题
GMPLS is based upon：（）
A
Packet-based switching devices
B
VPI/VCI-based switching devices
C
Non-Packet-based devices
D
None of the above
E
A and B
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单选题Which command will display the MPLS label binding for IP prefix 1.1.1.0 on the router？（）A
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The tunnel that is not configured with the policy-class command acts as the defaultB
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单选题Using more than one label on a single packet is required in what context？（）A
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MPLS VPNC
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In all the above circumstances
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