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Nokia Segment Routing Exam Sample Questions (Q15-Q20):
NEW QUESTION # 15
Which of the following is not required to be advertised by a router participating in Segment Routing?
- A. SRGB when SRv6 is configured
- B. Support for SR-MPLS for IPv4 or IPv6, or SRv6
- C. Adjacency-SIDs
- D. Local Node-SID
Answer: A
Explanation:
SRGB when SRv6 is configured: This is not required to be advertised, SRGB(Segment Routing Global Block) is only used for SR-MPLS and is not needed when SRv6 is configured. Instead, SRv6 uses the IANA-assigned IPv6 address space.
NEW QUESTION # 16
Examine the exhibit. Based upon the configuration, which routers will the LSP go through?
- A. R1, R3, R4 and R6
- B. R1, R3, R2, R5, R4 and R6
- C. R1, R2, R4 and R6
- D. R1, R2, R5 and R6
Answer: A
NEW QUESTION # 17
The exhibit shows the fast re-route configuration on router R1, in which both R-LFA and TI-LFA have been enabled. Assume that there are multiple potential backup paths for a given prefix. Which of the following options will router R1 use?
- A. A D-LFA path that would coincide with the path after IGP re-convergence.
- B. A standard LFA path that would not coincide with the path after IGP re-convergence.
- C. A D-LFA path that would not coincide with the path after IGP re-convergence.
- D. An R-LFA path that would not coincide with the path after IGP re-convergence.
Answer: A
Explanation:
The exhibit shows that both R-LFA and TI-LFA have been enabled on router R1. R-LFA (Remote Loop-Free Alternate) is a method that is used to protect the active segment of a tunnel, and it allows the router to find a backup path that coincides with the path that will become active after IGP reconvergence. TI-LFA (Topology Independent LFA) is a method that is used to protect an end-to-end multi-segment tunnel, it allows the router to find a backup path that does not rely on the IGP topology, but on the segment routing topology.
With R-LFA and TI-LFA enabled, router R1 will use a D-LFA (Dual-Loop-Free Alternate) path, which is a combination of both R-LFA and TI-LFA, this path will coincide with the path after IGP re-convergence.
A standard LFA, R-LFA, and D-LFA which do not coincide with the path after IGP re-convergence are not the options.
NEW QUESTION # 18
Which of the following statements about SR-TE administrative constraints is FALSE?
- A. The head-end router may calculate a path that takes into account max hop count and bandwidth constraints.
- B. Shared-Risk-Link Groups are only taken into account when calculating the secondary path.
- C. The TE metric for a link is by default the same as the IGP metric.
- D. A strict hop must be adjacent to the previous hop in the list.
Answer: B
Explanation:
Shared-Risk-Link Groups(SRLG) is taken into account when calculating both primary and secondary path to avoid routing over the same physical link.
NEW QUESTION # 19
Which of the following types of information is considered by a stateless PCE when it processes a new LSP path calculation request?
- A. The IGP link-state database
- B. The operational state of existing LSP paths
- C. The traffic-engineering database
- D. The amount of bandwidth reserved for each of the existing LSP paths
Answer: A
NEW QUESTION # 20
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