Nokia 4A0-105 Online Practice Questions and Exam Preparation

Nokia 4A0-105 Online Questions & Answers

• Question 111:

  Click on the exhibit below.

  

  A new site is added to PE-D of Metro B. Which of the following statement below is true?

  A. If a spoke-SDP is configured between the new site and PE-D no further SDPs will be required.
  B. If a mesh- SDP is configured between the new site and PE-D no further SDPs will be required.
  C. A mesh- SDP must be configured between the new site and all other PEs within Metro B.
  D. A spoke- SDP must be configured between the new site and all other PEs within Metro B.
  A. If a spoke-SDP is configured between the new site and PE-D no further SDPs will be required.

• Question 112:

  When a PE node receives a PBB encapsulated frame on a B-VPLS, how does the PE determine which l-VPLS it belongs to?

  A. The l-TAG in the l-SID is inspected to determine where the frame should be delivered.
  B. When the B-MAC header is stripped the customer MAC address is then looked up in the FDB
  C. The l-SID in the l-TAG is inspected to determine where the frame should be delivered.
  D. The PE inspects the service label in the MPLS header before stripping the B-MAC header.
  C. The l-SID in the l-TAG is inspected to determine where the frame should be delivered.

• Question 113:

  Click on the exhibit below.

  

  The VPLS service MTU on R2 is 1514 bytes. What must the service MTU be on all other routers participating in the VPLS?

  A. The service MTU must be equal to or smaller than 1514 bytes.
  B. The service MTU must be 1514 bytes.
  C. The service MTU must be equal to or greater than 1514 bytes.
  D. The service MTU can be any value.
  B. The service MTU must be 1514 bytes.

• Question 114:

  During the process of troubleshooting a VPLS problem the "oam mac-purge" command with "register" option was used to purge a MAC address from the FDB. Which of the following statements is true?

  A. Relearning of the MAC address that was purged can only be done once customer traffic resumes.
  B. Relearning of the MAC address that was purged can only be done with the "oam mac- populate" command.
  C. Customer traffic destined to the MAC address that was purged will be dropped until the MAC address is relearned with the "oam mac-populate" command.
  D. Relearning of the MAC address that was purged can only be done with the "oam mac- register" command.
  B. Relearning of the MAC address that was purged can only be done with the "oam mac- populate" command.

• Question 115:

  Which of the following best describes the difference between VPWS and VPLS?

  A. Unlike VPLS. VPWS appears as a multi-hop network to the customers.
  B. Unlike VPLS, VPWS allows CEs that are member of the same service instance to communicate with each other as if they are connected via a bridged LAN.
  C. Unlike VPWS, VPLS allows customers to view the network as a routed network.
  D. Unlike VPWS, VPLS is a service where customer MAC addresses are learned.
  D. Unlike VPWS, VPLS is a service where customer MAC addresses are learned.

• Question 116:

  Which of the following are true when ports are configured with the IEEE 802.3ah Loopback Control feature? (Choose 3)

  A. The loopback control PDU instructs the remote port to enter loopback mode.
  B. Putting a port in loopback does not affect customer data flow
  C. Both ports must rediscover the OAM capabilities of each other once the port is put back into service.
  D. Both ports must still send Information PDUs to avoid going back to discovery mode.
  E. When a port is in loopback mode, service mirroring will still work if it is a mirror-source or mirror-destination.
  F. All packets, except for information PDUs, are looped back.
  A. The loopback control PDU instructs the remote port to enter loopback mode.
  D. Both ports must still send Information PDUs to avoid going back to discovery mode.
  F. All packets, except for information PDUs, are looped back.

• Question 117:

  Click on the exhibit below.

  

  Assume there are two VPLS services configured on the MDU. How could load-balancing be achieved when using Active/Standby pseudowires?

  A. This cannot be done.
  B. Each VPLS will use the same pair of SDP's with the same endpoint configured with the option "load-balancing 2".
  C. Each VPLS will need their own pair of spoke-SDP's configured. The spoke-sdp's that are to be active should be configured with the option "precedence primary".
  D. Under the end-point configuration, enable load-balancing 2 and the MDU will load balance automatically.
  C. Each VPLS will need their own pair of spoke-SDP's configured. The spoke-sdp's that are to be active should be configured with the option "precedence primary".

• Question 118:

  What configuration is required on the CE device when using MC-LAG?

  A. The CE must be configured with an MC-LAG to both PE devices.
  B. The CE must be configured with LACP in active mode.
  C. There is no configuration required on the CE.
  D. The CE must be an Alcatel-Lucent 7750 SR.
  B. The CE must be configured with LACP in active mode.

• Question 119:

  In Active/Standby pseudowires a failed pseudowire has recovered. Under what circumstances will the active pseudowire revert to the previously failed link?

  A. It will always revert to the previously failed link.
  B. It will never revert to the previously failed link.
  C. It will revert if the precedence of the previously failed link is set to 0 or "primary".
  D. It will revert if the precedence of the previously failed link is lower than the currently active link
  C. It will revert if the precedence of the previously failed link is set to 0 or "primary".

• Question 120:

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