4A0-105 試験問題を無料オンラインアクセス

What needs to be configured in a VPLS in order to forward customer STP BPDUs transparently?

• A.Spanning tree must be disabled within the VPLS.
• B.Spanning tree BPDUs must be tagged.
• C.Spanning tree must be enabled within the VPLS.
• D.Spanning tree BPDUs must be untagged.

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.If the traffic is primarily multicast, a full mesh of SDPs is a simple and efficient design.
• C.If the traffic is primarily Unicast, a full mesh of SDPs is a simple and efficient design.
• D.STP is not required to break the loop because of split-horizon rules.

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.Valuable in the last-mile connection to the Service Provider demarcation device.
• D.Can be used at the core to trigger MPLS protection mechanisms when a physical failure detection is not possible.
• E.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.

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

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

Which of the following best describes the difference between VPWS and VPLS?

• A.Unlike VPLS, VPWS allows CEs that are member of the same service instance to communicate with each other as if they are connected via a bridged LAN.
• B.Unlike VPWS, VPLS allows customers to view the network as a routed network.
• C.Unlike VPLS. VPWS appears as a multi-hop network to the customers.
• D.Unlike VPWS, VPLS is a service where customer MAC addresses are learned.