Nokia Nokia Certifications 4A0-105 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.

  Correct Answer: A

• Question 112:

  Click on the exhibit below.

  

  How many LSPs are required in total between Metro A and Metro B if 100 hierarchical VPLS services are deployed across the two metro networks?

  A. 100

  B. 200

  C. 1

  D. 2

  Correct Answer: D

• Question 113:

  Redundant spoke-SDPs are used between 2 Metro networks for redundancy. How can load balancing be achieved across the redundant spoke-SDPs?

  A. A single management VPLS using RSTP can be used to block different SDPs for different VPLS services.

  B. A single management VPLS using 802.1D-2004 can be used to block different SDPs for different VPLS services

  C. There is no way to have load balancing across redundant spoke-SDPs.

  D. Two management VPLS using RSTP can be used to block different SDPs for different VPLS services.

  Correct Answer: D

• Question 114:

  What scaling factors should a network engineer be aware of when designing VPLS networks? (Choose 3)

  A. Control plane scaling.

  B. Data plane scaling.

  C. Network touches.

  D. Route table reduction.

  E. OAM tools.

  Correct Answer: ABC

• Question 115:

  What are the advantages of running a physical ring topology with a mesh of mesh-SDPs? (Choose 2)

  A. STP can be used to break the loop.

  B. STP is not required to break the loop because of split-horizon rules.

  C. If the traffic is primarily multicast, a full mesh of SDPs is a simple and efficient design.

  D. If the traffic is primarily Unicast, a full mesh of SDPs is a simple and efficient design.

  Correct Answer: BD

• Question 116:

  Consider a large metro-to-metro VPLS network interconnected with a mesh of mesh-SDPs. Which of the following statements does NOT apply to this situation?

  A. Bandwidth and replication inefficiency can occur on inter-metro links if there is a lot of multicast traffic

  B. The number of control sessions grows exponentially in a fully meshed network.

  C. Spanning-tree is required to prevent loops when using mesh SDPs on the inter-metro links.

  D. Network touches increase with each node added to the mesh.

  Correct Answer: C

• Question 117:

  Why are provisioning requirements a factor that influence VPLS design? (Choose 2)

  A. Adding or removing a node may require several network touches.

  B. Adding or removing a SAP may require several network touches.

  C. Adding or removing a service may require several network touches.

  D. Adding or removing an Epipe may require several network touches.

  E. Provisioning is a factor for all Ethernet services.

  Correct Answer: AC

• Question 118:

  Click on the exhibit below.

  

  Assume PE-1 has a mesh-sdp configured to every PE node in both Metro networks. What could be done to prevent the bandwidth replication between Metro 1 and Metro 2?

  A. PE-1 must be configured with mesh-SDPs to every node receiving the multicast traffic. There is no way to reduce the replication or bandwidth.

  B. PE nodes in Metro 1 could be configured with mesh-SDPs. PE nodes in Metro 2 would be configured with mesh-SDPs. However, the connection between Metro networks (PE-2 to PE-6) can be configured with a spoke-sdp. This would reduce the replication and bandwidth used on the link between Metro networks. This also reduces the replication required by PE-1.

  C. PE-1 can be configured with spoke-SDPs to every PE node in both Metro networks. This will reduce the bandwidth and replication within the network.

  D. PE nodes in Metro 1 could be configured with spoke-SDPs. PE nodes in Metro 2 would be configured with spoke-SDPs. However, the connection between Metro networks (PE-2 to PE-6) can be configured with a mesh-sdp. This would reduce the replication and bandwidth used on the link between Metro networks. This also reduces the replication required by PE-1.

  Correct Answer: B

• Question 119:

  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 "loadbalancing 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.

  Correct Answer: C

• Question 120:

  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

  Correct Answer: C