单选题Using more than one label on a single packet is required in what context?()AMPLS TEBMPLS VPNCWhen CEF switching and Label switching is doneDIn all the above circumstances

单选题
Using more than one label on a single packet is required in what context?()
A

MPLS TE

B

MPLS VPN

C

When CEF switching and Label switching is done

D

In all the above circumstances


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