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Nokia 4A0-103 Nokia Multi Protocol Label Switching Exam Practice Test

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Nokia Multi Protocol Label Switching Questions and Answers

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Question 1

Which of the following are functions of the MPLS control plane in a router? (Choose two)

Options:

A.

Label allocation and management.

B.

Label swapping.

C.

Pushing a label on an unlabeled packet.

D.

Label signaling.

E.

Routing lookups.

Question 2

Which of the following statements best describes downstream unsolicited label distribution?

Options:

A.

An LER may answer requests for label mappings immediately, without waiting for a label mapping from the next-hop.

B.

An LER may advertise label mappings to all peers for which it might be a next-hop for a given FEC.

C.

An LER propagates a label mapping downstream for a FEC. only if it has a label mapping for the FEC next-hop.

D.

An LER will only distribute a label for a FEC when it has been requested to do so.

Question 3

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?

Options:

A.

10Mbps

B.

20Mbps

C.

30Mpbs

D.

60Mbps

E.

70Mbps

Question 4

Which of the following statements regarding RSVP-TE is FALSE?

Options:

A.

RSVP-TE operates in a downstream unsolicited label advertisement mode.

B.

RSVP-TE makes use of ordered control mode.

C.

RSVP-TE is an MPLS signaling protocol, based on the resource reservation protocol.

D.

RSVP-TE enables the establishment of explicitly routed LSPs that can be automatically routed away from network failures

E.

RSVP-TE supports explicitly routed LSPs using either loose or strict route definitions.

Question 5

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

Options:

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.

Question 6

Click on the exhibit button below.

LSP "toR8-5" requests fast reroute protection on the primary loose path. What could be done to remove the Failure Code shown?

Options:

A.

CSPF must be enabled at head-end on fast reroute protected loose path LSPs

B.

Fast reroute must first be enabled on the downstream routers.

C.

CSPF must be enabled on all downstream loose hop routers.

D.

Global revertive path optimization must be enabled so the path will be re-optimized around a failed node.

Question 7

Click on the exhibit button below.

Which fields in this output uniquely identify the RSVP session belonging to a single LSP? (Choose three)

Options:

A.

Tunnel ID

B.

Name

C.

LSP ID

D.

To

Question 8

Which of the following are characteristics of an LSP? (Choose two)

Options:

A.

It is unidirectional.

B.

It is bidirectional.

C.

It must always have a secondary path.

D.

It provides a specific tunnel for a FEC through the network.

E.

It always follows the IGP best path.

Question 9

Click on the exhibit button below.

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

Options:

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.

Question 10

You wish to advertise LDP labels for all local networks; which is the most effective policy statement to use?

Options:

A.

from prefix-list direct

B.

match local

C.

from protocol direct

D.

match protocol direct

E.

from protocol local

Question 11

Which of the following describes what happens when facility backup fast reroute is enabled for a LSP? Choose three answers.

Options:

A.

Each PLR will signal a bypass tunnel that avoids the next-hop node or link.

B.

When a failure occurs, the PLR will push an additional label onto the label stack and start forwarding traffic onto its bypass tunnel.

C.

The ingress router will include a RRO object in the path message to indicate the routers that should be PLRs and MPs along the protected path.

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 bypass tunnels.

E.

When the bypass tunnel is in use, the MP will include the RRO object in its PathErr message, with the local protection in use flag set to notify the ingress router that it is using the bypass tunnel.

Question 12

Which of the following statements regarding per-platform label space are true? Choose two answers.

Options:

A.

A separate label is used for each interface that the FEC is advertised on.

B.

It uses fewer label resources than a per-interface label space.

C.

It is typically used when the device has ATM or Frame Relay interfaces.

D.

It uses more label resources than a per-interface label space.

E.

A single label may be assigned to an FEC and used across all interfaces of the same router.

F.

It is only valid when the LDP peers are directly connected over an interface, and the label is only going to be used for traffic sent over that interface.

Question 13

Which of the following about RSVP-TE is TRUE?

Options:

A.

RSVP-TE is a routing protocol.

B.

RSVP-TE requests end-to-end resources for unidirectional data flow.

C.

RSVP-TE consults the local RSVP database to determine the path from source to destination.

D.

RSVP-TE generates a TED for storing traffic engineering information.

Question 14

What action does a router perform when it looks up the label of an incoming packet in its LFIB and sees that the LFIB maps to an egress label of 3?

Options:

A.

It requests a new label from the peer that provided this label.

B.

It pops the label.

C.

It pushes an additional label onto the label stack.

D.

It signals a new label to the peer that sent the packet.

Question 15

Click on the exhibit button below.

Given the configuration below, which of the following commands would enable fast reroute on the LSP? Choose two answers

Options:

A.

This configuration already is configured for FRR.

B.

fast-reroute facility

C.

fast-reroute one-to-one

D.

secondary

E.

standby

Question 16

Which of the following are the default settings for the Alcatel-Lucent 7750 SR when using LDP?

Options:

A.

Per-platform label space, conservative retention mode

B.

Per-interface label space, conservative retention mode

C.

Per-platform label space, liberal retention mode

D.

Per-interface label space, liberal retention mode

Question 17

Which LSA is used for OSPF-TE purposes?

Options:

A.

Type 9 LSA ?Link local LSA

B.

Type 10 LSA ?Area local LSA

C.

Type 8 LSA ?TE router LSA

D.

Type 11 LSA ?Network LSA

Question 18

How does MPLS-TE overcome the issue of IP hyper-aggregation?

Options:

A.

By enabling the creation of LSPs across alternate links to balance the network traffic.

B.

By eliminating the requirement for core IP routing.

C.

By not allowing more than one LSP to use a particular path.

D.

By defining multiple LSPs across a network and implementing an IGP load balancing algorithm across them.

Question 19

Click on the exhibit button below.

Under which condition might the peer LDP ID 10.10.10.2:0 entry show state "Nonexistent"?

Options:

A.

When the interface to the peer router is down.

B.

When router R1 has no route to the peer address 10.10.10.2.

C.

When the adjacency between the two routers fails.

D.

When the targeted session is not yet configured.

Question 20

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.

Options:

A.

Independent control mode.

B.

Ordered control mode.

C.

Liberal label retention.

D.

Conservative label retention.

E.

Downstream on demand

Question 21

Click on the exhibit.

Which of the following CANNOT be used to ensure the LSP toR6" will follow the path R1-R2-R4-R6?

Options:

A.

Admin groups

B.

Hop-limit

C.

Strict hops

D.

TE-Metric

Question 22

Which of the following about Fast Reroute node protection tunnels is FALSE?

Options:

A.

Node protection tunnels detour around a failed next downstream router.

B.

Node protection tunnels can only be requested for a primary LSP path.

C.

Node protection tunnels are only used by one-to-one Fast Reroute.

D.

Link protection tunnels are established if a router is unable to establish node protection tunnels.

Question 23

Which of the following regarding the MPLS SWAP label operation is TRUE?

Options:

A.

The inner label will be exchanged with the MPLS outer label.

B.

The inner label will be exchanged for a new label.

C.

The outer label will be exchanged for a new label.

D.

All labels will be exchanged for one new label.

E.

All labels will be exchanged for an equal number of new labels.

Question 24

Click on the exhibit.

All links are of equal cost. A CSPF-enabled LSP is configured on R1 to R6. Its fully loose primary path is configured with an "include green" statement and the fully loose secondary path is configured with an "include red" statement.

Which paths will be taken by this LSP?

Options:

A.

No primary path is established. The secondary path will take R1-R2-R4-R6.

B.

The primary path will take R1-R3-R5-R6. The secondary path will take R1-R2-R4-R6.

C.

The primary path will take R1-R2-R4-R6. No secondary path is established.

D.

The primary path will take R1-R2-R4-R6. The secondary path will take R1-R3-R5-R6.

Question 25

Which of the following is NOT required to configure an Alcatel-Lucent 7750 SR as a PE router running 6PE?

Options:

A.

Configure BGP with the IPv6 address family.

B.

Configure BGP to add IPv6 Explicit Null labels.

C.

Configure a route policy to export IPv6 routes into BGP.

D.

Configure the nexthop core router as a BGP peer.

Question 26

Click on the exhibit.

The link between routers R4 and R6 are configured with an admin group "red". What happens when the LSP is first signaled?

Options:

A.

The LSP will go through the path R1-R2-R4-R6.

B.

The LSP will go through the path R1-R3-R5-R6.

C.

The LSP is down because router R1 detects that no path can meet its constraints.

D.

The LSP is down because router R4 detects that no path can meet its constraints.

Question 27

Which of the following is NOT an advantage of RSVP-TE compared to LDP?

Options:

A.

RSVP-TE supports Connection Admission Control (CAC).

B.

RSVP-TE enables simplified configuration of LSPs.

C.

RSVP-TE supports path calculations that do not use IGP cost.

D.

RSVP-TE provides support for traffic protection features.

Question 28

Click on the exhibit.

An LSP traverses R1-R2-R3-R6 and one-to-one fast reroute is enabled. If the protected LSP transports two labels, and router R2 has failed, how many labels will be on the detour path?

Options:

A.

1

B.

2

C.

3

D.

4

Question 29

Which of the following about LDP-over-RSVP is TRUE?

Options:

A.

RSVP LSPs must exist between each PE-ABR pair, or ABR-ABR pair in each area.

B.

When LDP-over-RSVP is active, the LDP prefixes are resolved to a physical egress interface.

C.

Targeted sessions must exist between all routers along the tunnel path.

D.

Link LDP sessions must exist between each ABR-ABR pair in each area.

Question 30

Click on the exhibit.

All links have 1Gbps unreserved bandwidth initially and Shared Explicit reservation style is used. After the LSP's primary and standby secondary paths are signaled, how much unreserved bandwidth is left on the links?

Options:

A.

R1-R2 will have 300Mbps left and R2-R4 will have 400Mbps left.

B.

R1-R2 will have 400Mbps left and R2-R4 will have 400Mbps left.

C.

R1-R2 will have 600Mbps left and R2-R4 will have 600Mbps left.

D.

R1-R2 will have 300Mbps left and R2-R4 will have 600Mbps left.

Question 31

What are the default settings for RSVP-TE on the Alcatel-Lucent 7750 SR?

Options:

A.

Per-interface label space, liberal retention mode

B.

Per-platform label space; liberal retention mode

C.

Per-interface label space, conservative retention mode

D.

Per-platform label space, conservative retention mode

Question 32

Which of the following about RSVP-TE is FALSE?

Options:

A.

It supports traffic protection using IGP equal cost paths.

B.

It supports CAC to prevent resource overbooking.

C.

It supports LSPs with traffic engineering constraints.

D.

It supports LSPs that follow the IGP best path.

Question 33

Which of the following regarding per-platform label space is TRUE?

Options:

A.

A separate label is used for each interface on which the FEC is advertised.

B.

A single label is assigned to a FEC for all interfaces on the same router,

C.

It is typically used when the device has ATM or Frame Relay interfaces.

D.

It uses more label resources than a per-interface label space.

Question 34

Click on the exhibit.

After the Isp-ping command is executed, which of the following best describe the router's action?

Options:

A.

MPLS Echo Request packets are sent unlabeled to the prefix 192.10.1.2.

B.

MPLS Echo Request packets are sent within the LDP tunnel that are signaled for 192.10.1.2.

C.

MPLS Echo Request packets are sent within the RSVP-TE tunnel that are signaled for 192.10.1.2.

D.

MPLS Echo Request packets are sent over TCP.

Question 35

Which of the following is NOT an application of MPLS?

Options:

A.

Enabling VPNs

B.

Enabling traffic engineering

C.

Enabling network security

D.

Enhancing network resiliency

Question 36

Which of the following regarding label population is TRUE?

Options:

A.

Selected labels from the FIB are populated to the LFIB.

B.

Selected labels from the RIB are populated to the FIB.

C.

Selected labels from the LIB are populated to the FIB.

D.

Selected labels from the LIB are populated to the LFIB.

Question 37

Which of the following best describes downstream on demand label distribution?

Options:

A.

An LSR answers requests for label mappings immediately, without waiting for a label mapping from the next-hop.

B.

An LSR advertises label mappings to all peers for which it might be a next-hop for a given FEC.

C.

An LSR distributes a label mapping for a FEC when it has been requested to do so.

D.

An LSR propagates a label mapping downstream for a FEC. only if it has a label mapping for the FEC's next-hop.

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