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4A0-103 Nokia Alcatel-Lucent Multi Protocol Label Switching Free Practice Exam Questions (2025 Updated)

Prepare effectively for your Nokia 4A0-103 Alcatel-Lucent Multi Protocol Label Switching certification with our extensive collection of free, high-quality practice questions. Each question is designed to mirror the actual exam format and objectives, complete with comprehensive answers and detailed explanations. Our materials are regularly updated for 2025, ensuring you have the most current resources to build confidence and succeed on your first attempt.

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Total 249 questions

Which of the following statements best describe MPLS fast reroute characteristics? (Choose two)

A.

Fast reroute requires you to manually define detour paths.

B.

Fast reroute provides path protection close to the failure point

C.

Fast reroute performs automatic path calculation and signaling.

D.

Fast reroute protects both primary and secondary paths.

Click on the exhibit button below.

Given the configuration below, which of the following scenarios is FALSE?

A.

Both the primary and secondary paths are explicitly defined.

B.

The primary path is active and the secondary path is in hot standby.

C.

The LSP defined will use the primary path and will signal the secondary path to become active if the primary path fails.

D.

The LSP has the same source and destination for both primary and secondary paths.

Which of the following statements regarding RSVP refresh reduction are true1? (Choose two)

A.

Message-IDs replace individual refresh messages.

B.

Refresh reduction applies only to reservation messages.

C.

RSVP generates a summary-refresh message for each LSP.

D.

An LSP state change causes an incremented Message-ID.

When configuring an LSP for fast reroute one-to-one protection, which of the following statements is true?

A.

The LSP can also use facility backup.

B.

The LSP is limited to node protection.

C.

You cannot request bandwidth on the protected LSP.

D.

Node protection can be disabled.

A targeted-LDP session may exist between directly connected or non-directly connected devices

A.

TRUE

B.

FALSE

Assume that, on the Alcatel-Lucent 7750 SR, an LSP is configured with one-to-one FRR and node protection. Which of the following statements are FALSE? (Choose two)

A.

Each PLR signals a detour LSP that avoids the downstream node. If the downstream node cannot be avoided, a detour LSP that avoids the downstream link is signaled.

B.

The detour LSP can take one or more hops before merging back on the protected LSP.

C.

The merge point of the protected LSP must be the next-next-hop node

D.

The ingress router will set the local protection desired flag in the session attribute object of the path message to inform all routers along the protected LSP path to establish detour LSPs.

E.

The label recording desired flag must be set in the session attribute object in order for the PLR to know what label to swap when using the detour LSP.

Click on the exhibit button below.

With fast reroute enabled, and given the following:

    The protected LSP path is R1-R2-R3.

    All links are of equal cost.

Which of the following statements is true? (Choose two)

A.

Router R1 is the LSP originator and is also a PLR.

B.

With one-to-one link or node protection, the detour LSP path is R1-R4-R5-R2-R3.

C.

With one-to-one link or node protection, the detour LSP path is R1-R4-R5-R3.

D.

If the R2-R3 link fails, router R3 becomes a PLR

E.

None of the nodes can be protected with FRR.

Which of the following is described by the following statement? An LSR propagates a label mapping only for a FEC for which it has a label mapping for the FEC next-hop.

A.

Independent control mode

B.

Ordered control mode

C.

Liberal label retention

D.

Conservative label retention

E.

Downstream on demand.

Click on the exhibit button below.

If the four LSPs shown use the shared-explicit reservation style, how much bandwidth does CSPF request across a single 1Gbps link?

A.

100Mbps

B.

200Mbps

C.

300Mpbs

D.

600Mbps

E.

700Mbps

Which of the following prerequisites must you configure on a router to enable LDP-over-RSVP support? (Choose two)

A.

Configure the T-LDP peers for tunneling.

B.

Configure tunneled T-LDP sessions between PE routers.

C.

Enable Idp-over-rsvp in the IGP configuration on the PEs and ABRs

D.

Enable LSP stitching on the RSVP LSPs

What is the function of the MPLS label assigned to a packet?

A.

It identifies the FEC.

B.

It specifies the packet's header length

C.

It identifies the origin of the packet.

D.

It specifies the type of data contained in the packet

Click on the exhibit button below.

Given the configuration shown, how much of a link's 100Mbps reservable bandwidth can an LSP access when configured for class-type 0 and priority 1?

A.

10Mbps

B.

20Mbps

C.

30Mpbs

D.

60Mbps

E.

70Mbps

Which of the following best describes constraint-based routing?

A.

A mechanism that implements opaque LSAs.

B.

A mechanism that computes routes based on defined user requirements.

C.

A mechanism that allows the IGP shortest path to be used.

D.

A mechanism that allows RSVP or LDP signaling to use a route other than the IGP best route to establish a LSP.

Which of the following statements regarding the last two octets of the LDP identifier is true?

A.

It is always a random 16-bit number.

B.

It is always zero for per-interface label space.

C.

It is always non-zero.

D.

It is always zero for per-platform label space.

E.

It is always non-zero for per-platform label space.

Which approach to LSP path diversity provides the most control, but the least flexibility?

A.

Administrative Groups

B.

Shared Risk Link Groups

C.

Strict hop LSP paths

D.

Fast reroute

What is the common usage of the MPLS EXP bits?

A.

Each implementation can use them as they see fit.

B.

They are used to carry the Ethertype value.

C.

They are used to carry the TTL value.

D.

They are used to carry QoS classification.

E.

They are used to carry fragmentation flag information

Which of the following statements is true of an established LDP session?

A.

It uses a UDP connection with an arbitrary port number.

B.

It uses a UDP connection with well known port number 646.

C.

It uses a TCP connection with an arbitrary port number.

D.

It uses a TCP connection with well known port number 646.

Which of the following is described by the following statement? An LSR propagates a label mapping only for an FEC for which it has a label mapping for the FEC next-hop.

A.

Independent control mode.

B.

Ordered control mode.

C.

Liberal label retention.

D.

Conservative label retention.

E.

Downstream on demand

Click on the exhibit button below.

Consider the output shown; why is the label in bold font not in use?

A.

The router cannot do a SWAP of this label.

B.

The label does not match the egress label for the same FEC.

C.

The label is for a FEC for which the next-hop is the peer router

D.

The label was signaled in error.

Which of the following is a primary cause of IP hyper-aggregation?

A.

IP routing protocols do not always select the best route to a destination.

B.

IP routing protocols always select multiple routes to a destination.

C.

IP routing protocols do not make use of all available network attributes to select a path

D.

Improper network design results in limited network path redundancy.

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