Click on the exhibit below.

The following VPLS services and SAPs have been configured. Which of the following statements is true?

A. All untagged frames will be dropped.

B. The source MAC address of a frame with a top tag of 200 and bottom tag of 300 will be populated in VPLS 3.

C. All frames with more than one tag will be dropped.

D. The source MAC address of a frame with a single tag of 500 will be populated in VPLS 1.

E. The source MAC address of a frame with a top tag of 100 will be populated in VPLS 2.

When spanning tree is enabled within a VPLS service and the STP mode is 802.1 D 2004 what happens if a PVST BPDU is received on a SAP?

A. Spanning tree will be disabled on the SAP that the PVST BPDU was received on.

B. The SAP that the PVST BPDU was received on will be disabled to prevent loops.

C. The spanning tree encapsulation will be dynamically changed to PVST on the SAP the PVST BPDU was received on.

D. The PVST BPDU will be ignored and 802.1D 2004 BPDUs will continue to be transmitted on the SAP.

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.

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.

What is the DA address used for in the Ethernet Header?

A. MAC learning

B. SA filtering

C. Routing table population

D. Frame forwarding

How is MAC learning achieved in traditional Ethernet switches?

A. As frames leave the switch, the DA is populated into the FDB.

B. As frames enter the switch, the DA is populated into the FDB.

C. As frames leave the switch, the SA is populated into the FDB.

D. As frames enter the switch, the SA is populated into the FDB.

One of the shortcomings of Spanning Tree Protocol (STP) is that it computes a valid, but not necessarily optimal, path between nodes within a network.

A. TRUE

B. FALSE

When ports configured with IEEE 802.3ah EFM are operationally down, what must the device do before declaring the ports are up?

A. The device will try to force the other side up using the evaluating flag in the PDU.

B. The device will wait for the trasmit-interval of 5 before trying to rediscover the neighbor.

C. The device will detect the port change and will wait for normal operation mode.

D. The device will detect the port change and revert to discovery mode.

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.

A LAG is configured with LACP passive mode enabled. When will LACP packets be sent?

A. On initialization and then every hello-interval.

B. Only after receiving LACP packets.

C. Every 1 second.

D. Never.