Alcatel-Lucent Multi Protocol Label Switching - 4A0-103 Exam Questions [2026]

QUESTION NO: 1
Which of the following commands is used to display the database containing the OSPF-TE LSAs?

A. show router ospf database B. show router ospf opaque-database C. show router ospf te opaque D. show router ospf opaque-Isa

Correct Answer: B

QUESTION NO: 2
Fill in the blanks: A ________device has all interfaces inside the provider domain, and a _______ device has at least one interface outside the provider domain.

A. PE, P B. PE, CE C. CE, P D. CE, PE E. P, PE

Correct Answer: E

QUESTION NO: 3
Which of the following regarding the MPLS SWAP label operation is TRUE?

A. All labels will be exchanged for an equal number of new labels. B. The outer label will be exchanged for a new label. C. The inner label will be exchanged with the MPLS outer label. D. The inner label will be exchanged for a new label. E. All labels will be exchanged for one new label.

Correct Answer: B

QUESTION NO: 4
Which of the following configurations allow a router to periodically attempt to move LSP traffic to a better path, if the head end can find one?

A. configure router mpls retry-attempts 30 B. configure router mpls retry-timer 30 C. configure router mpls global-revertive 30 D. configure router mpls resignal-timer 30

Correct Answer: D

QUESTION NO: 5
Which of the following are characteristics of an LSP? (Choose two)

A. It always follows the IGP best path. B. It provides a specific tunnel for a FEC through the network. C. It is unidirectional. D. It is bidirectional. E. It must always have a secondary path.

Correct Answer: B,C

QUESTION NO: 6
Which of the following indicates the path over which an LSP's tail end router will return an RSVP RESV message?

A. The opaque database. B. The Path State Block (PSB) C. The Reservation State Block (RSB) D. The IGP FIB.

Correct Answer: B

QUESTION NO: 7
Which of the following is TRUE when the explicit null is implemented?

A. The penultimate router will pop the top label from the packets. B. The eLER will receive packets with a top label value of 3. C. The penultimate router will forward packets to the eLER, based on the IP header. D. The eLER will receive packets with a top label value of 0.

Correct Answer: D

QUESTION NO: 8
Click on the exhibit.

This LSP terminates on a system IP address. What is the system address of the destination node?

A. 10.48.1.1 B. 10.1.4.78 C. 10.1.2.2 D. 10.32.1.2

Correct Answer: A

QUESTION NO: 9
Which of the following about MPLS shortcuts for IGP on an Alcatel-Lucent 7750 SR is FALSE?

A. An IGP route takes priority over a transport tunnel. B. Multiple MPLS tunnels can be installed in the FIB. C. Both LDP and RSVP-TE based tunnels can be used. D. MPLS tunnels can be used to resolve the prefixes learned via IGP.

Correct Answer: A

QUESTION NO: 10
What is the purpose of the MPLS TC field (EXP bits)?

A. It is used to carry the TTL value. B. It is used to carry fragmentation flag information. C. It is used to carry the Ether type value. D. Each implementation can use it as they see fit. E. It is used to carry QoS classification.

Correct Answer: E

QUESTION NO: 11
Which of the following are the default settings for the Alcatel-Lucent 7750 SR when using
LDP?

A. Ordered control mode; downstream unsolicited. B. Ordered control mode; downstream on demand. C. Independent control mode; downstream unsolicited. D. Independent control mode; downstream on demand.

Correct Answer: A