Nokia New 2023 4A0-116 Test Tutorial (Updated 42 Questions) [Q15-Q33]

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Nokia New 2023 4A0-116 Test Tutorial (Updated 42 Questions)

4A0-116 Exam Questions Dumps, Selling Nokia Products

Q15. Based on the exhibit, which of the following is a viable option for the Path Computation Element (PCE) to obtain all the necessary topology and traffic-engineering information from the network, so that it can calculate LSP paths on behalf of the PE routers?

Establishing an IGP adjacency with router R2

Establishing IGP adjacencies with routers R1 and R2

Establishing a BGP session using the BGP-LS address family with router R3

Establishing BGP sessions using the BGP-LS address family with routers R3 and R4

Q16. An SR-TE LSP with a path definition that includes router R4 as a loose hop and for which Seamless-BFD has been enabled is following the path shown in the exhibit. What happens after router R4 fails if the routers along the path follow the default behavior?

The head end will periodically try to calculate a new path at a rate defined by the retry timer.

The head end will periodically try to calculate a new path at a rate defined by the resignal timer.

The head end will continue forwarding traffic to the current next-hop indefinitely, which will be discarded at the point of failure.

The head end will continue forwarding traffic to the current next-hop indefinitely, and R2 will redirect the traffic to R3 after IGP reconvergence.

Q17. Which of the following steps is NOT required when configuring IS-IS to support Segment Routing?

MPLS label range reserved for Segment Routing.

Enable interfaces used for Segment Routing under

The flooding scope of Segment Routing information.

The Segment Routing Global Block range.

Q18. In which of the following aspects does the configuration of flex-algo LSPs have an advantage over the configuration of SR-TE LSPs?

Label stack size of the encapsulated data packets

List of traffic-engineering constraint types available to choose from

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

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

Q19. Based on the configuration shown for routers R1 and R10, what valid flex-algo definitions exist in the network?

No valid flex-algo definitions, because of the conflicting parameters.

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

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

Two 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.

Q20. Which of the following is NOT a valid option to steer traffic into a flex-algo segment-routing tunnel?

Using 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.

Specifying 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.

Configuring 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.

Configuring 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.

Q21. Which of the following statements about the Path Computation Element (PCE) is FALSE?

The PCE can obtain topology and traffic-engineering information from the network using either a link-state IGP or BGP-LS.

A stateful PCE proactively monitors all the existing LSPs and triggers the necessary repairs and re-optimizations.

A stateless PCE can calculate cross-area traffic-engineering-constrained LSP paths.

A stateful PCE can allow LSPs to reserve bandwidth.

Q22. Which of the following statements about Multi-Protocol Label Switching networks is FALSE?

MPLS uses a signaling protocol to exchange labels between routers.

An LSR forwards data based on the MPLS labels.

An LSP is a bi-directional tunnel that uses MPLS labels to forward data.

The data is transparently carried from end to end.

Q23. Based on the exhibit, which of the following statements about fast re-route for flex-algo instance 129 is TRUE?

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

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

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

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

Q24. Which of the following is an advantage of enabling label stack reduction for a CSPF-calculated path, as compared to using plain CSPF?

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

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

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

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

Q25. Which of the following statements about Segment Routing tunnels is FALSE?

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

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

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

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

Q26. 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?

Only segments defined by a Node-SID.

Only segments defined by an Adjacency-SID.

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

No segments, unless segment-routing fast-reroute is also explicitly enabled.

Q27. In the context of a network that includes a Path Computation Element (PCE), what is a PCC-initiated LSP?

An LSP that needs to be explicitly configured on the head-end router.

An LSP for which the initial path is calculated by the head-end router.

An LSP for which the path repairs and re-optimizations must be triggered by the head-end router.

An LSP whose existence and state are reported to the PCE.

Q28. A router participating in SR-TE is advertising a value of Ox11 for the admin-group membership of one of its interfaces. Which of the following statements is TRUE?

The interface belongs to admin group RED, configured with a value of 17.

The interface belongs to two different admin groups.

The interface belongs to three different admin groups.

The interface belongs to four different admin groups.

Q29. Which of the following statements about SR-TE administrative constraints is FALSE?

A strict hop must be adjacent to the previous hop in the list.

The TE metric for a link is by default the same as the IGP metric.

Shared-Risk-Link Groups are only taken into account when calculating the secondary path.

The head-end router may calculate a path that takes into account max hop count and bandwidth constraints.

Q30. When OSPF is used to support Segment Routing, the first byte of the link-state ID associated with each of the opaque LSAs indicates the type of information being advertised. Which of the following associations between the first-byte value and its meaning is FALSE?

Value 1 – Traffic Engineering

Value 4 – Router Info

Value 7 – SRGB Range

Value 8 – Extended Link Info

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Nokia New 2023 4A0-116 Test Tutorial (Updated 42 Questions) [Q15-Q33]

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