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Q9. Which bridge will become the root bridge? 

A. Bridge B 

B. Bridge C 

C. Bridge D 

D. Bridge E 

Answer: D 


Q10. Based on the partial configuration below which management VPLS will manage VPLS 100? 

A. Management VPLS 1 

B. Management VPLS 2 

C. VPLS 100 will not be managed 

D. Spanning must be enabled on VPLS 100 for it to be managed 

Answer: A 


Q11. When enabling Spanning Tree in a VPLS what is the default Spanning Tree Protocol? 

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. A LDP Control message will be sent to all devices in the mesh participating in the VPLS instance. Only MAC addresses associated with PE that the failure occurred on will be flushed. 

D. A LDP control message will be sent to all devices in the mesh participating in the VPLS instance. The entire FDB will be flushed. 

Answer: D 


Q12. Imagine that a new router called 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 for the new site 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 

Answer: C 


Q13. If the device connected to PE-A sends a frame to PE-A that requires replication within the VPLS which devises 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 

Answer: B 


Q14. After the disable-learning command has been executed at the VPLS level, a new client device originates a frame. What is the result? 

A. If the MAC address of this new client device does not reach the upper limit of the configured total number of MAC addresses allowed in the VPLS forwarding database, then the new MAC address will be stored 

B. The new source MAC addresses will not be entered in the VPLS service forwarding database 

C. New local source MAC addresses will not be entered in the VPLS service forwarding database, but new remote MAC addresses would continue to be entered 

D. New remote source MAC addresses will not be entered in the VPLS services forwarding database, but new local MAC addresses would continue to be entered 

Answer: B 


Q15. Based on the output below which of the following statements is true? 

B. This Bridge is theRoot Bridge 

C. SAP1/1/1 is an Edge Port 

D. This Bridge is closest to theRoot Bridge within the VPLS mesh 

Answer: D 


Q16. Assume a customer has 4 sites. The customer has full mesh VPLS service. 

There is a back door connection between 2 sites on the customer network. This has created a 

loop and Spanning Tree has been enabled on all SAPs within the VPLS service. What is the role 

of the Primary Bridge? 

A. The PE devices participating in the VPLS mesh run a separate Spanning Tree instance in the Core. ThePrimary Bridge is the Root Bridge for the VPLS mesh. 

B. The PE devices participating in the VPLS mesh determine which bridge is closest toRoot Bridge. This bridge becomes the Primary Bridge. All mesh-SDPs form a zero cost path towards the Primary Bridge. 

C. The PE devices participating in the VPLS mesh determine which bridge is closest toRoot Bridge. This bridge becomes the Primary Bridge. All PE devices calculate a higher cost path towards the Primary Bridge. 

D. The PE devices participating in the VPLS mesh determine which bridge is furthest from theRoot Bridge. This bridge becomes the Primary Bridge. All mesh-SDPs form a zero cost path towards the Primary Bridge. 

Answer: B