Alcatel-Lucent Alcatel-Lucent Certifications 4A0-105 Questions & Answers

• Question 11:

  The following question relates to this command syntax: "config>service# vpls 9000 customer 6 create". Which of the following statements are correct? (Choose 2)

  A. The customer-id in this command is 9000.

  B. The service-id in this command is 9000.

  C. This value 9000 should be unique across the network as a best practice.

  D. The vc-id will be 6 for the service by default.

  E. The egress vc-label will be 9000.

  Correct Answer: BC

• Question 12:

  What is PBB also known as?

  A. H-VPLS

  B. IEEE 802.lag

  C. MAC aggregation

  D. MAC-in-MAC

  Correct Answer: D

• Question 13:

  What function in IEEE 802.1 ah helps to limit the amount of MAC addresses learned in the core?

  A. I-VPLS is configured in the core of the network with an l-MAC address. This l-MAC address is the only MAC learned in the core

  B. The B-VPLS and l-VPLS are configured in the edge. The B-VPLS is configured with a Backbone MAC and is the only MAC learned in the core

  C. Each SDP is configured with a Backbone MAC to hide customer MAC addresses in the core D. Each SAP is associated with a common l-MAC to hide customer MAC addresses in the core

  Correct Answer: B

• Question 14:

  Click on the exhibit below.

  

  Based on the following configuration which VLANs will be managed by the management VPLS?

  A. VLANs 1-4094

  B. VLAN 0

  C. There is not enough information provided

  D. None, this is an invalid configuration

  Correct Answer: A

• Question 15:

  Click on the exhibit below.

  

  In the diagram below, SAP 1 is put into the blocking state as a result of the spanning tree protocol. What will occur in the VPLS instance if SAP 2 goes down and SAP 1 transitions to the forwarding state? Select the most accurate statement.

  A. A Spanning Tree BPDU will be sent across the mesh flushing the FDB table in all devices participating in the VPLS instance.

  B. Stale information will be used within the VPLS instance to forward traffic until the FDB ages out.

  C. An LDP control message will be sent to all devices in the mesh participating in the VPLS instance. Only MAC addresses associated with the PE that the failure occurred on will be flushed.

  D. An LDP control message will be sent to all devices in the mesh participating in the VPLS instance. The entire FDB in the VPLS instance will be flushed.

  Correct Answer: D

• Question 16:

  Click on the exhibit below.

  

  Which port will become the alternate port?

  A. Bridge B 1/1/3

  B. Bridge B 1/1/2

  C. Bridge C 1/1/2

  D. Bridge C 2/1/1

  E. Bridge D 1/1/1

  F. Bridge D 1/1/3

  G. Bridge E 1/1/1

  H. Bridge E 1/1/3

  Correct Answer: A

• Question 17:

  Click on the exhibit below.

  

  Which port will become the alternate port?

  A. Bridge B 1/1/3

  B. Bridge B 1/1/2

  C. Bridge C 1/1/2

  D. Bridge C 2/1/1

  E. Bridge D 1/1/1

  F. Bridge D 1/1/3

  G. Bridge E 1/1/1

  H. Bridge E 1/1/3

  Correct Answer: B

• Question 18:

  A router has just learned the 10th MAC address while the FDB size is also set to 10. What is the likely outcome?

  A. The frame is dropped.

  B. The frame is always flooded

  C. The frame is forwarded and MAC learning is automatically disabled.

  D. The frame is discarded if the destination is unknown.

  E. More information is required to determine the fate of this new frame.

  Correct Answer: C

• Question 19:

  Click on the exhibit below.

  

  A new router named PE-D is to be directly connected to PE-C and is required to be added to the existing

  VPLS 300. The design requires the least amount of signaling, the least amount of configuration changes

  for existing sites and the new site has to have access to all existing sites.

  How should the new site be added to VPLS 300?

  A. Configure a mesh-sdp between all existing PE routers and the new PE router

  B. Configure a mesh-sdp between PE-C and PE-D

  C. Configure a spoke-sdp between PE-C and PE-D.

  D. It is not possible to meet the design requirements.

  Correct Answer: C

• Question 20:

  Click on the exhibit below.

  

  Based on the service-mtu of this B-VPLS, what is the maximum service-mtu of any connecting I-VPLS attached to this B-VPLS?

  A. 9100 bytes

  B. 9104 bytes

  C. 9108 bytes

  D. 9118 bytes

  Correct Answer: A