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Q25. Which of the following is described by the following statement? An LSR propagates a label mapping only for a FEC for which it has a label mapping for the FEC next-hop.
A. Independent control mode
B. Ordered control mode
C. Liberal label retention
D. Conservative label retention
E. Downstream on demand.
Answer: B
Q26. Assume that, on the Alcatel-Lucent 7750 SR, an LSP is configured with one-to-one FRR and node protection. Which of the following statements are FALSE? (Choose two)
A. Each PLR signals a detour LSP that avoids the downstream node. If the downstream node
cannot be avoided, a detour LSP that avoids the downstream link is signaled.
B. The detour LSP can take one or more hops before merging back on the protected LSP.
C. The merge point of the protected LSP must be the next-next-hop node
D. The ingress router will set the local protection desired flag in the session attribute object of the path message to inform all routers along the protected LSP path to establish detour LSPs.
E. The label recording desired flag must be set in the session attribute object in order for the PLR to know what label to swap when using the detour LSP.
Answer: C,E
Q27. Which of the following statements regarding RSVP-TE is FALSE?
A. RSVP-TE operates in a downstream unsolicited label advertisement mode.
B. RSVP-TE makes use of ordered control mode.
C. RSVP-TE is an MPLS signaling protocol, based on the resource reservation protocol.
D. RSVP-TE enables the establishment of explicitly routed LSPs that can be automatically routed away from network failures
E. RSVP-TE supports explicitly routed LSPs using either loose or strict route definitions.
Answer: A
Q28. Click on the exhibit button below.
LSP 1's link between routers R3 and R6 has failed, and the RESV state at router R3 has timed out. Which of the following actions will router R3 initiate?
A. Send a PathTear message towards router R6.
B. Send a PathTear message towards router R1.
C. Send a ResvTear message toward router R6.
D. Send a ResvTear message toward router R1.
Answer: D
Q29. In MPLS, labels are distributed in the opposite direction of the data flow.
A. TRUE
B. FALSE
Answer: A
Q30. Which of the following are characteristics of ECMP LSPs in LDP? Choose three answers
A. Liberal label retention mode
B. T-LDP enabled with peers to which load balancing is desired.
C. ECMP enabled in the config>router context.
D. Hashing used to select the egress label.
E. Export policy applied to advertise multiple labels for a given FEC.
Answer: A,C,E
Q31. Which of the following message types does RSVP use to set up an LSP? (Choose two)
A. Path message
B. iLER message
C. Resv message
D. LSP setup call request
E. eLER message
Answer: A,C
Q32. Which of the following statements regarding DiffServ-TE LSPs is true?
A. The Maximum Allocation Model (MAM) provides the most efficient bandwidth utilization model
B. In the Maximum Allocation Model (MAM), each CT receives dedicated bandwidth constraints.
C. In the Russian Doll Model (RDM), a CT2 LSP automatically preempts a CT1 LSP.
D. Using the Russian Doll Mode! (RDM), a CT1 LSP may use unreserved CTO bandwidth.
Answer: B