Which of the following statements about the VC-ID is false?
A. The vc-id is signaled in the control plane.
B. The vc-id is part of the data plane encapsulation.
C. There is a vc-id to vc-label mapping.
D. The vc-id has point to point significance.
Which of the following statements about Spanning Tree Protocol is true?
A. For the switches that are non-root or designated switches, the port with the highest combined cost to the root is the root port.
B. In the case where two switches have the same priority, the switch with the lowest MAC address becomes the root.
C. The switch port that is the greatest distance from the LAN to the root is the designated port.
D. All of the above.
Which of the following describes the scope of the IEEE 802.3ah EFM standard? (Choose 3)
A. Monitor and troubleshoot a point-to-point full-duplex link.
B. Monitor and troubleshoot end-to-end services.
C. Can be used at the core to trigger MPLS protection mechanisms when a physical failure detection is not possible.
D. Should not be used at the core to trigger MPLS protection. BFD is the only method that can be used when physical failure detection is not possible.
E. Valuable in the last-mile connection to the Service Provider demarcation device.
To reduce the amount of flooding between PE devices which of the following steps should be taken?
A. Configure the local age timer to be larger.
B. Configure the local age timer to be lower.
C. Configure the remote age timer to be larger.
D. Configure the remote age to be lower.
Which of the following statements about Spanning Tree Protocol is true?
A. The switch with the lowest priority becomes the root.
B. The switch with the highest priority becomes the root.
C. The switch with the lowest MAC address always becomes the root.
D. The switch with the highest MAC address always becomes the root.
Click on the exhibit below.
You have been requested to add load balancing across the redundant spoke-SDPs in the network shown. What further configuration is required? (Choose 2)
A. An additional management VPLS.
B. Another set of LSPs between PE1 and PE3 and between PE2 and PE4.
C. Another set of SDPs between PE1 and PE3 and between PE2 and PE4.
D. Load balancing has to be enabled within the management VPLS.
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.
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
Click on the exhibit below.
Assuming there is a full mesh of mesh-SDPs between the PEs within each metro network and a spoke-SDP between PE-C of Metro A and PE-B of Metro B. how is traffic forwarded from PE-A in Metro A to PED of Metro B? Select the most accurate statement.
A. An LSP must be configured between PE-A and PE-D for this traffic to be forwarded.
B. A VPLS FDB lookup is done at PE-A of Metro A only
C. An SDP must be configured between PE-A of Metro A and PE-D of Metro D for this traffic to be forwarded
D. A VPLS FDB lookup is done at PE-A and PE-C of Metro A and PE-B of Metro B
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.
