Nokia 4A0-105 Online Practice Questions and Exam Preparation

Nokia 4A0-105 Online Questions & Answers

• Question 131:

  Click on the exhibit below.

  

  If the device connected to PE-A in Metro A sends a frame to PE-A that requires replication within the VPLS which devices is PE-A responsible for replicating the frame to?

  A. PE-A must replicate the frame to all devices participating in the VPLS
  B. PE-A must replicate the frame to all PEs within Metro A
  C. PE-A must replicate the frame to all devices in the Metro A
  D. All of the above
  B. PE-A must replicate the frame to all PEs within Metro A

• Question 132:

  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.
  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.

• Question 133:

  What is the name of the feature supported on the Alcatel-Lucent 7750 SR that prevents MAC explosion in large VPLS deployments?

  A. H-VPLS
  B. M-VPLS
  C. PBB
  D. MC-EP
  C. PBB

• Question 134:

  Click on the exhibit below.

  

  If the SDP between R2 and R1 goes down, what devices will be reachable from R2 through the VPLS?

  A. Only R4 will be reachable through the VPLS.
  B. All devices will be reachable through the VPLS.
  C. R4 and R3 will remain reachable.
  D. No devices will be reachable.
  A. Only R4 will be reachable through the VPLS.

• Question 135:

  What is the maximum number of VLANs supported on a traditional Layer 2 switch?

  A. 4094
  B. 8190
  C. 32768
  D. 131071
  A. 4094

• Question 136:

  What is PBB also known as?

  A. H-VPLS
  B. IEEE 802.lag
  C. MAC aggregation
  D. MAC-in-MAC
  D. MAC-in-MAC

• Question 137:

  Which of the following is NOT a feature of the IEEE 802.3ah EFM standard?

  A. Discovery and auto-negotiation of OAM capabilities.
  B. Link monitoring via event notifications.
  C. Remote failure indication (RFI).
  D. Remote Loopback
  E. Latency and jitter across a service.
  E. Latency and jitter across a service.

• Question 138:

  Click on the exhibit below.

  

  The SAP on PE-A has been configured with dot1q encapsulation. The SAP on PE-B has been configured with qinq encapsulation. CE-A sends frames with a single tag of 100. The VLAN tag from CE-A must be passed transparently. CE-B is expecting a frame with a top tag of 200 and bottom tag of 100. Which of the following is the correct SAP id for PE-B?

  A. sap 1/1/1:200.100
  B. sap 1/1/1:200*
  C. sap 1/1/1:*
  D. sap 1/1/1:0*
  B. sap 1/1/1:200*

• Question 139:

  In IEEE 802.1ag, how are loops detected?

  A. Spanning-tree BPDUs are returned to the sender.
  B. The MEP sees its own CFM frames returned to itself.
  C. This is not a function of IEEE 802.lag but of 802.1D
  D. The record field of the CFM frame keeps track of chassis-mac addresses.
  B. The MEP sees its own CFM frames returned to itself.

• Question 140:

  Why should you configure send-flush-on failure on your PE routers when using active/standby pseudowires?

  A. It flushes the local FDB speeding recovery
  B. It discards all packets in the queue and sends icmp-discad messages to the sender. The packets are re-transmitted resulting in no loss of data.
  C. On failure, the PE sends an LDP flush-all-from-me message to all PE devices in the VPLS. This speeds convergence to the new topology.
  D. It is not important to use send-flush-on-failure as Active/Standby signalling automatically converges the FDB in all VPLS instances
  C. On failure, the PE sends an LDP flush-all-from-me message to all PE devices in the VPLS. This speeds convergence to the new topology.