Alcatel-Lucent Multi Protocol Label Switching (4A0-103) Free Practice Test

Question 1

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

A. You cannot request bandwidth on the protected LSP.

B. Node protection can be disabled.

C. The LSP can also use facility backup.

D. The LSP is limited to node protection.

Correct Answer: B

Question 2

On a point-to-point link, two directly connected routers set different interface hello timeout values. Router R1 uses 15 seconds, while router R2 uses 30 seconds. What happens to the LDP adjacency?

A. The adjacency forms with the higher timeout value

B. The adjacency times out after 30 seconds

C. The adjacency forms with the lower timeout value

D. The "show router Idp session" command output displays the adjacency in state "init"

Correct Answer: C

Question 3

Click on the exhibit.

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?

A. R3 and R5 become DMPs; R6 becomes MP.

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

C. R3 and R5 become DMPs; R4 becomes MP.

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

Correct Answer: A

Question 4

An Alcatel-Lucent 7750 SR label switches a packet it receives. The packet has an outer label TTL of 250 and an inner label TTL of 251. Which of the following is TRUE?

A. The outer label TTL will be 251 and the inner label TTL will be 252.

B. The outer label TTL will be 251 and the inner label TTL will be 251.

C. The outer label TTL will be 249 and the inner label TTL will be 251.

D. The outer label TTL will be 249 and the inner label TTL will be 250.

Correct Answer: C

Question 5

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?

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

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

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

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

Correct Answer: D

Question 6

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

A. 20

B. 16

C. 32

D. 25

E. 24

Correct Answer: A

Question 7

What is the common usage of the MPLS EXP bits?

A. They are used to carry QoS classification.

B. They are used to carry the Ethertype value.

C. They are used to carry the TTL value.

D. Each implementation can use them as they see fit.

E. They are used to carry fragmentation flag information

Correct Answer: A

Question 8

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

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

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

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

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

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.

Correct Answer: A,E

Question 9

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. Downstream on demand.

B. Liberal label retention

C. Independent control mode

D. Ordered control mode

E. Conservative label retention

Correct Answer: D

Question 10

Which of the following about the use of RRO in fast reroute is FALSE?

A. RRO contains the MP information that is required by a PLR for facility protection.

B. RRO is used to inform downstream routers about the protection type requested.

C. RRO is used to report the protection tunnel status to the head-end router.

D. RRO contains the label information that is expected by an MP for facility protection.

Correct Answer: B

Question 11

Which default LDP parameter are you able to change with CLI?

A. Label space mode

B. Label retention

C. Keepalive factor

D. Control mode

Correct Answer: C

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Alcatel-Lucent Multi Protocol Label Switching (4A0-103) Free Practice Test