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4A0-116 Nokia Segment Routing Exam Question and Answers

Question # 4

For any of the LFA methods to work properly, there must be a router in the backup path that will forward traffic addressed to the destination without sending it back to the source. Which of the following statements describes the way R-LFA selects such a router?

A.

It selects an immediate neighbor.

B.

It selects a remote router, reachable through a tunnel defined by a single Node-SID.

C.

It selects a remote router, reachable through a tunnel defined by a Node-SID and one or two Adjacency-SIDs.

D.

It can select an immediate neighbor or a remote router, as long as the backup path coincides with the path that will become active after IGP reconvergence.

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Question # 5

Which of the following is an advantage of enabling label stack reduction for a CSPF-calculated path, as compared to using plain CSPF?

A.

The number of hops included in the end-to-end path is reduced.

B.

The path calculation can be delegated to an external path computation element (PCE).

C.

There is a larger list of traffic-engineering constraint types that can be imposed on the LSP path.

D.

The routers in the calculated path can take advantage of ECMP to better distribute the traffic load.

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Question # 6

Which of the following statements about primary and secondary SR-TE LSP paths is FALSE?

A.

Only one LSP path forwards the traffic at any time,

B.

Up to three paths can be configured for a given SR-TE LS

C.

The primary path is always preferred over a secondary pa

D.

Preference values can be configured for non-standby secondary paths.

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