Cisco
350-001 · Question #130
350-001 Question #130: Real Exam Question with Answer & Explanation
The correct answer is D: It enables the Edge LSR to request a label pop operation from its upstream neighbors.. In order to implement penultimate hop popping, the edge LSR requests a label pop operation from its upstream neighbor via LDP or TDP using a special implicit-null label. This label has a value of 3 for LDP and 1 for TDP.
Question
Which three of these statements about penultimate hop popping are true? (Choose three.)
Options
- AIt is used only for directly connected subnets or aggregate routes.
- BIt can only be used with LDP.
- CIt is only used when two or more labels are stacked.
- DIt enables the Edge LSR to request a label pop operation from its upstream neighbors.
- EIt is requested through TDP using a special label value that is also called the implicit-null value.
- FIt is requested through LDP using a special label value that is also called the implicit-null value.
Explanation
In order to implement penultimate hop popping, the edge LSR requests a label pop operation from its upstream neighbor via LDP or TDP using a special implicit-null label. This label has a value of 3 for LDP and 1 for TDP.
Community Discussion
No community discussion yet for this question.