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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

Question 1

Which of the following about configuring an LSP path definition on an Alcatel-Lucent 7750 SR is FALSE?

Options:

A.

A path definition can have both loose and strict hops.

B.

A path definition can be configured with loose hops only.

C.

A path definition is configured on the head-end router only,

D.

A path definition is not required if CSPF is enabled on an LSP.

Question 2

Click on the exhibit.

Question # 2

A fully loose LSP MtoR6" is enabled with FRR protection. All links have the same cost. After the link between R2 and R4 goes down, FRR protection repairs the LSP and traffic traverses on R1-R2-R7-R8-R4-R6. By default, which of the following about this LSP on an Alcatel-Lucent 7750 SR is FALSE?

Options:

A.

The LSP will switch to R1-R3-R5-R6 after the resignal timer expires.

B.

The old primary path and its detours are torn down after the new primary path is established.

C.

CSPF must be enabled to find a more optimal path.

D.

The traffic is switched to R1-R3-R5-R6 in an MBB fashion.

Question 3

Which of the following about Link TLVs found inside Type 10 Opaque LSAs is FALSE?

Options:

A.

Link TLVs are used to advertise administrative group information.

B.

Link TLVs are exchanged once RSVP is enabled on the interfaces.

C.

Link TLVs are used to advertise router-IDs.

D.

Link TLVs are used to advertise bandwidth information.

Question 4

Click on the exhibit.

Question # 4

Why might router R2 have a Link LDP session to R1 (10.10.10.1:0) but not to R3 (10.10.10.3:0)?

Options:

A.

LDP is not configured on R2.

B.

R2 does not have a route to 10.10.10.3.

C.

LDP is not configured on R3's interface to R2.

D.

The targeted session is not configured on R2.

Question 5

Which of the following about CAC is FALSE?

Options:

A.

CAC is used when the LSP path has not been computed by CSPF.

B.

CAC is used when the LSP path has been computed by CSPF.

C.

CAC is used to perform a bandwidth check on each egress interface of the downstream router.

D.

CAC is used to perform a bandwidth check based on the router's LSDB.

Question 6

Click on the exhibit.

Question # 6

RSVP state for LSP 1 has timed out on router R3. Which of the following actions will router R3 initiate to clear the RSVP session?

Options:

A.

Send a RESV Tear message toward router R6.

B.

Send a RESV Tear message toward router R1.

C.

Send a RESV Error message toward router R6.

D.

Send a RESV Error message toward router R1.

Question 7

Click on the exhibit.

Question # 7

The link between routers R4 and R6 is down before the LSP issignaled. CSPF is enabled on the LSP. Which of the following conditions is TRUE?

Options:

A.

Router R1 sends a PATH message and router R4 sends back a PATH Error message.

B.

Router R1 does not send a PATH message because it detects an error.

C.

Router R1 sends a PATH message and router R4 sends back a PATH Tear message.

D.

Router R1 sends a PATH message and router R4 sends back a RESV Error message.

Question 8

An LSP is configured with a fully loose path and CSPF is not enabled. An LSR receives the first PATH message for this LSP. Which of the following is NOT performed by the LSR?

Options:

A.

The LSR regenerates and forwards a new PATH message.

B.

The LSR stores the PATH message in the PSB.

C.

The LSR forwards the PATH message based on the HOP object in the RSB.

D.

The LSR looks up the PATH message's destination IP address in the FIB.

Question 9

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 10

Click on the exhibit.

Question # 10

An LSP path is established on router R1 toward router R6. If the link between routers R4 and R6 goes down, which of the following is the quickest way for service recovery?

Options:

A.

Router R1 updates its FIB after a new SPF calculation.

B.

Router R1 switches to a secondary path.

C.

Router R4 switches to a FRR path.

D.

Router R4 switches to a standby secondary path.

Question 11

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

Options:

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.

Question 12

Which of the following statements best defines an LSP?

Options:

A.

An LSP is a bidirectional path across the MPLS domain.

B.

An LSP is a bidirectional path for a particular FEC across the MPLS domain.

C.

An LSP is a unidirectional path across the MPLS domain.

D.

An LSP is a bidirectional path between adjacent LSRs.

E.

An LSP is a unidirectional path between adjacent LSRs.

Question 13

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

Options:

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

Question 14

How many bits of the MPLS header are used for the label field?

Options:

A.

16

B.

20

C.

24

D.

25

E.

32

Question 15

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

Options:

A.

Ordered control mode; downstream on demand.

B.

Ordered control mode; downstream unsolicited.

C.

Independent control mode; downstream on demand.

D.

Independent control mode; downstream unsolicited.

Question 16

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

Options:

A.

TRUE

B.

FALSE

Question 17

You wish to build an LSP originating on router R1, transiting the path R1-R2-R4-R5-R6, and terminating on router R6. How many strict hops would you define in your path statement?

Options:

A.

4

B.

1

C.

5

D.

6

Question 18

Which of the following routing protocols are supported on the Alcatel-Lucent 7750 SR to enable constraint-based LSPs? (Choose two)

Options:

A.

RIPv2-TE

B.

CSPF

C.

OSPF-TE

D.

ISIS-TE

E.

RSVP-TE

Question 19

Which of the following statements regarding DiffServ-TE LSPs is true?

Options:

A.

The Maximum Allocation Model (MAM) provides the most efficient bandwidth utilization model

B.

In the Maximum Allocation Model (MAM), each CT receives dedicated bandwidth constraints.

C.

In the Russian Doll Model (RDM), a CT2 LSP automatically preempts a CT1 LSP.

D.

Using the Russian Doll Mode! (RDM), a CT1 LSP may use unreserved CTO bandwidth.

Question 20

Click on the exhibit button below.

Question # 20

Assuming that LSP R1-R2-R3 requests the default fast reroute configuration, which router becomes a DMP for the detour tunnels?

Options:

A.

Router R1

B.

Router R2

C.

Router R3

D.

Router R4

E.

Router R5

Question 21

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 22

Which one of the following statements regarding the detour object transported in the detour path message is true?

Options:

A.

The PLR sends it downstream with the RRO.

B.

The PLR sends it downstream with the ERO.

C.

It associates all detours with the source PLR.

D.

The MP sends it upstream with the RESV message.

Question 23

Fill in the blanks: The device at the beginning of an LSP is referred to as the_________, and the device at the end of an LSP is referred to as the___________.

Options:

A.

PE, P

B.

LER,LSR

C.

LSR,LER

D.

iLER, eLER

E.

eLER, iLER

F.

P, PE

Question 24

Click on the exhibit.

Question # 24

Given the output below, which of the following is FALSE?

Options:

A.

A packet arriving with label 131066 will be forwarded out interface 1 /1 /4 with label 131070.

B.

The router is an egress router for FEC 10.10.10.221/32.

C.

There are multiple LSPs to reach FEC 10.10.10.244/32.

D.

The router's system address is 10.10.10.242/32.

Question 25

Which of the following are characteristics of ECMP LSPs in LDP? Choose three answers

Options:

A.

Liberal label retention mode

B.

T-LDP enabled with peers to which load balancing is desired.

C.

ECMP enabled in the config>router context.

D.

Hashing used to select the egress label.

E.

Export policy applied to advertise multiple labels for a given FEC.

Question 26

Click on the exhibit button below.

Question # 26

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 27

Which of the following devices receives labeled packets from the MPLS domain, removes the MPLS header, and forwards unlabeled packets outside the MPLS domain?

Options:

A.

P router

B.

LSR

C.

eLER

D.

iLER

Question 28

Click on the exhibit button below.

Question # 28

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 29

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 30

If the destination IP address of a received unlabeled packet is successfully matched in the FIB, which of the following statements are true? Choose two answers.

Options:

A.

A PUSH label stack operation must be performed.

B.

The outgoing interface and next-hop address will be determined from the FIB.

C.

The packet can be forwarded as a labeled or unlabeled packet.

D.

A POP label stack operation may be performed.

Question 31

Click on the exhibit.

Question # 31

The path of a fast reroute protected LSP is R1-R2-R3. Which of the following about the protected LSP path is TRUE?

Options:

A.

All routers along the path, R1, R2, and R3 can be PLRs.

B.

If the R1-R2 link fails, router R4 becomes an MP.

C.

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

D.

Router R1 is the LSP head-end and can be a PLR.

Question 32

Which MPLS mode saves only active label mappings received from peer LSRs?

Options:

A.

Conservative label retention

B.

Liberal label retention

C.

Downstream on demand

D.

Downstream unsolicited

Question 33

Which of the following fields does NOT appear in the MPLS label header?

Options:

A.

Label

B.

Frame check sequence

C.

Traffic Class (previously called Experimental)

D.

Time To live

E.

Bottom of stack bit

Question 34

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 35

Click on the exhibit.

Question # 35

RSVP session state for LSP 1 has timed out on router R3. Which of the following actions will router R3 initiate to clear the RSVP session?

Options:

A.

Send a PATH Tear message toward router R6.

B.

Send a PATH Tear message toward router R1.

C.

Send a PATH Error message toward router R6.

D.

Send a PATH Error message toward router R1.

Question 36

Click on the exhibit.

Question # 36

An LSP traverses R1-R2-R4-R6 and one-to-one fast reroute with link protection is enabled. All links have the same cost. Which of the following about DMP and MP is TRUE?

Options:

A.

R3 and R5 become DMPs; R6 becomes MP.

B.

R3 and R5 become DMPs; R4 becomes MP.

C.

R3, R5, and R6 become DMPs; R4 becomes MP.

D.

R1, R3, and R5 becomes DMPs; R4 and R6 become MPs.

Question 37

To enable the LDP-over-RSVP feature, which of the following configurations is NOT required on an Alcatel-Lucent 7750 SR?

Options:

A.

Enable the Idp-over-rsvp feature on all PEs and ABRs along the LSP tunnel.

B.

Configure Link-LDP sessions between each PE-ABR and ABR-ABR pair.

C.

Configure RSVP-TE LSPs in each area between each PE-ABR and ABR-ABR pair.

D.

Configure T-LDP sessions with the tunneling option.

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