Free Cisco 350-501 SPCOR Actual Exam Questions - Question 8 Discussion
Refer to the exhibit. After a networking team configured this MPLS topology, the supervisor wants to view MPLS labels to verify the path that packets take from router R1 to router R7 The team already Issued an ICMP ping to verify connectivity between the devices. Which task must the team perform to allow the supervisor to view the label switch path? 
B imo, MPLS LDP is what actually assigns the labels, so without it, there wouldn’t be any labels to display. The team needs to make sure LDP is running to see the label info.
D imo, MPLS OAM is designed for monitoring and troubleshooting, so it makes sense that it can display the label info for each hop. The other choices are more about label distribution or setup, not viewing paths.
D seems right here since MPLS OAM helps to monitor and troubleshoot MPLS, which fits the need to see labels along the path. The other options look more about setup than viewing labels.