Nokia 4A0-116 Exam Practice Test Instant Access

Question 1

Examine the exhibit. Based upon the configuration, which routers will the LSP go through?

AR1, R3, R2, R5, R4 and R6

BR1, R2, R5 and R6

CR1, R3, R4 and R6

DR1, R2, R4 and R6

Answer : C

Question 2

OSPF is being used for segment routing with traffic-engineering (SR-TE). The traffic-engineering option has been set to "sr-te false". Which of the following statements is TRUE?

AThe TE information will be advertised for all the OSPF links that have MPLS enabled.

BThe TE information will only be advertised using application-specific sub-TLVs.

CThe TE information will only be advertised for the OSPF links that have both MPLS and RSVP enabled.

DThe TE information will only be advertised using extended-link opaque LSAs.

Answer : D

When using Segment Routing with Traffic Engineering (SR-TE) in OSPF, the TE information is advertised using extended-link opaque LSAs. The option 'sr-te false' indicates that OSPF will not advertise the TE information in the OSPF database, thus the routers will not be aware of the TE information.

Question 3

OSPF type-10 Opaque LSAs can carry different types of advertisements. What type of advertisement carries a router's local 5RGB information?

AExtended Prefix Info

BRouter Info

CExtended Link Info

DTraffic Engineering Info

Answer : B

This type of advertisement carries a router's local SRGB information, which is used to distribute information about the local SID allocation range

Question 4

Which of the following statements about Segment Routing tunnels is FALSE?

AA Segment Routing tunnel defined by a Node-SID uses the shortest IGP Path.

BA Segment Routing tunnel can be defined by multiple Node-SIDs.

CA Segment Routing tunnel can be defined by a combination of Node-SIDs and Adjacency-SIDs.

DFor a Segment Routing tunnel, an intermediate router will always forward the packet based on the best IGP path.

Answer : D

an intermediate router in a Segment Routing tunnel may forward packets based on the specific SIDs defined in the Segment Routing tunnel and not always the best IGP path.

Question 5

Loopfree-alternate has been enabled on a router for its link-state routing protocol. For which types of segments will the router attempt to find a backup path, so that they become protected by fast re-route?

AOnly segments defined by a Node-SID.

BOnly segments defined by an Adjacency-SID.

CSegments defined by a Node-SID and segments defined by an Adjacency-SID.

DNo segments, unless segment-routing fast-reroute is also explicitly enabled.

Answer : C

Loopfree-alternate is a mechanism that enables fast re-route for link-state routing protocols, it allows the router to find a backup path for both Node-SID and Adjacency-SID segments, so that they become protected by fast re-route.

Question 6

Based on the exhibit, which of the following statements about fast re-route for flex-algo instance 129 is TRUE?

AOnly standard LFA is enabled on router R1; fast re-route is not enabled on router R2.

BOnly standard LFA is enabled on both routers R1 and R2.

CStandard LFA and remote-LFA are enabled on router R1; fast re-route is not enabled on router R2.

DStandard LFA and remote-LFA are enabled on router R1; standard LFA and TT-LFA are enabled on router R2.

Answer : C

Question 7

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

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

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

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

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

Answer : A

Once a path is associated with an LSP, it cannot be used by other LSPs is False. A path can be used by multiple LSPs, but each LSP can have different attributes like bandwidth, priority and other constraints.

Nokia Segment Routing 4A0-116 Exam Practice Test