Which of the following statements about penultimate hop popping are true?
A) It can only be used with LDP
B) It enables the Edge LSR to request a label pop operation from its upstream neighbors
C) It is only used when two or more labels are stacked
D) It is requested through LDP using a special label value that is also called the implicit-null value
E) It is used only for directly connected subnets or aggregate routes
Correct Answer:
Verified
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