Nokia 4A0-116 Exam Practice Test Instant Access

Question 1

Which of the following is NOT a valid option to steer traffic into a flex-algo segment-routing tunnel?

AUsing a flex-algo Node-SID as an explicit hop in the path definition of an SR-TE LSP and enabling the sr-te tunnel type for a VPN service.

BSpecifying the flex-algo instance ID as an additional TE constraint for an SR-TE LSP and enabling the sr-te tunnel type for a VPN service.

CConfiguring and applying a VRF import policy to a VPRN service and enabling the sr-is-is or sr-ospf tunnel type for the service, depending on the underlying routing protocol.

DConfiguring and applying a VSI import policy to an EVPN service and enabling the sr-is-is or sr-ospf tunnel type for the service, depending on the underlying routing protocol.

Answer : D

Applying a VSI import policy to an EVPN service and enabling the sr-is-is or sr-ospf tunnel type for the service is not a valid option for steering traffic into a flex-algo segment-routing tunnel, VSI is not related to flex-algo SR.

Question 2

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 3

Based on the exhibit, and given that the system IP address of router RIO is 10.10.10.10, which of the following statements is FALSE?

ARouter Rl participates in at least two flex-algo instances.

BRouter RIO participates in flex-algo instance 130.

CThe Node-SID assigned to router RIO for flex-algo instance 129 is 524338.

DThe underlying routing protocol being used in the network for segment routing is IS-IS.

Answer : C

Question 4

To create a flex-algo instance in a network, which of the following configuration steps is mandatory?

AConfiguring the proper values for the shared-risk link groups (SRLGs) that will define the flex-algo topology.

BConfiguring at least one router in the network to create and advertise the flex-algo definition.

CSpecifying whether the LSP paths will be computed locally or by an external path computation element (PCE).

DConfiguring LSPs between every pair of PE routers.

Answer : B

To create a flex-algo instance in a network, it's mandatory to configure at least one router in the network to create and advertise the flex-algo definition, This is the first step in creating a flex-algo instance, and it's done by defining the flex-algo instance and its properties on one or more routers in the network.

The other steps are important to fine-tune the flex-algo instance, but not mandatory to create it.

Configuring the proper values for the shared-risk link groups (SRLGs) that will define the flex-algo topology.

Specifying whether the LSP paths will be computed locally or by an external path computation element (PCE).

Configuring LSPs between every pair of PE routers.

Question 5

Based on the configuration shown for routers R1 and R10, what valid flex-algo definitions exist in the network?

ANo valid flex-algo definitions, because of the conflicting parameters.

BOne valid flex-algo definition, using delay as the link metric and including green links.

COne valid flex-algo definition, using te-metric as the link metric and including blue links.

DTwo valid flex-algo definitions, one uses te-metric as the link metric and includes blue links and the other uses delay as the link met includes green links.

Answer : D

Question 6

In which of the following aspects does the configuration of flex-algo LSPs have an advantage over the configuration of SR-TE LSPs?

ALabel stack size of the encapsulated data packets

BList of traffic-engineering constraint types available to choose from

CAbility to associate one primary and up to two secondary paths to the same LSP

DFlexibility of configuring each LSP with its own set of traffic-engineering constraints

Answer : D

Flex-Algo LSPs are a type of LSP that allows for greater flexibility in configuring traffic engineering constraints. This is because flex-algo LSPs can be configured with a unique set of traffic engineering constraints for each LSP, whereas SR-TE LSPs use a predefined set of traffic engineering constraints that applies to all LSPs.

Label stack size of the encapsulated data packets, List of traffic-engineering constraint types available to choose from, and Ability to associate one primary and up to two secondary paths to the same LSP are not the advantages of flex-algo LSPs over SR-TE LSPs.

Question 7

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?

AA standard LFA path that would not coincide with the path after IGP re-convergence.

BAn R-LFA path that would not coincide with the path after IGP re-convergence.

CA D-LFA path that would not coincide with the path after IGP re-convergence.

DA D-LFA path that would coincide with the path after IGP re-convergence.

Answer : D

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.

Nokia 4A0-116 Nokia Segment Routing Exam Practice Test