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

• Question 41:

  When deploying Active/Standby pseudowires, the CE does not require any special configuration

  A. TRUE

  B. FALSE

  Correct Answer: B

• Question 42:

  What is the default Spanning Tree protocol used in a VPLS on the Alcatel-Lucent 7750 SR?

  A. 802.1D2004

  B. 802.1D 1998

  C. comp-dot1w

  D. PVST

  Correct Answer: A

• Question 43:

  Click on the exhibit below.

  

  Study the network diagram. Which of the following configurations is correct for user VPLS 100 on PE4?

  

  A. B. C.

  

  D. E.

  Correct Answer: C

• Question 44:

  RSTP blocks a spoke-sdp using a management VPLS. Is traffic affected on an ES using the same transport SDP?

  A. Yes

  B. No

  Correct Answer: A

• Question 45:

  

  Which of the following features can be enabled to eliminate MAC instability when using policy- based forwarding to redirect traffic to a Layer 2 DPI device?

  A. discard-unknown

  B. mac-move

  C. disable-learning

  D. enable-mac-stability

  Correct Answer: C

• Question 46:

  What needs to be configured in a VPLS in order to forward customer STP BPDUs transparently?

  A. Spanning tree must be enabled within the VPLS.

  B. Spanning tree BPDUs must be untagged.

  C. Spanning tree BPDUs must be tagged.

  D. Spanning tree must be disabled within the VPLS.

  Correct Answer: D

• Question 47:

  What is the result of initiating an oam mac-ping to an unknown unicast MAC address in a VPLS instance?

  A. The oam mac-ping will fail. The MAC address must be known in the local FDB to be successful.

  B. The request will be flooded and the only response will come from the PE node that has learned the specified MAC address on a local SAP.

  C. The request will be flooded and the CE device with the corresponding MAC will reply.

  D. All nodes will reply because the oam mac-ping is flooded.

  Correct Answer: B

• Question 48:

  The "discard-unknown" command has been enabled at the VPLS level. Which of the following statements is true? (Choose 2)

  A. Broadcast traffic will be flooded.

  B. If the unicastSA has not been learned in the FDB, the frame will be dropped.

  C. If the unicast DA has not been learned in the FDB, the frame will be dropped.

  D. All traffic will be dropped, including multicast and broadcast.

  E. Broadcast traffic will be dropped.

  Correct Answer: AC

• Question 49:

  The FDB has learned 2 MAC addresses. The first is from a device accessible via a locality defined SAP, the second is from a device accessible via an SDP. Both MAC addresses were learned at the exact same time. If all traffic from these hosts stops at the same time, which address will age out first from the FDB based on default settings?

  A. MAC learned via SAP

  B. MAC learned via SDP

  C. There is not enough information to determine

  D. Both will timeout at the same time

  Correct Answer: A

• Question 50:

  What is the MTU impact on the SDP path-mtu if fast reroute facilities-mode is implemented on the LSP?

  A. There will be no impact on the path-mtu.

  B. The path-mtu will decrease by4 bytes.

  C. The path-mtu will increase by 4 bytes.

  D. The path-mtu will decrease by 8 bytes.

  E. The path-mtu will increase by 8 bytes.

  Correct Answer: B