Free Cisco 350-501 SPCOR Actual Exam Questions - Question 6 Discussion
Refer to the exihibit. 
Refer to the exhibit. An engineer configured R6 as the headend LSR of an RSVP-TE LSP to router XR2, with the dynamic path signaled as R6-R2-R5-XR2. and set the OSPF cost of all links to 1. MPLS autotunnel backup Is enabled on all routers to protect the LSP. Which two NNHOP backup tunnels should the engineer use to complete the implementation? (Choose two.)
I think it should be A and B. B obviously backs up the R2-R5 link directly, which is crucial. A provides a valid alternate path from R6 that avoids the primary path and covers the backup for R6 well. C seems too long and passes through extra routers which might not be necessary or efficient for a backup tunnel here. D and E include parts of the primary path, so they don’t really qualify as backups. So A and B fit the criteria better as proper NNHOP backup tunnels.
B and C make sense since B protects the R2-R5 link, and C offers an alternate route to XR2.
A and C seem plausible, but is the link status between R2 and XR1 confirmed?