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Exam : Alcatel-Lucent 4A0-105
Title : Alcatel-Lucent Virtual Private LAN Services

1. Which of the following best describes the difference between VPWS and VPLS?
A.VPWS is a point-to-point service where CEs are presented with point- to-point virtual circuits whereas VPLS is a bridged LAN service provided to a set of CEs that are members of a L2 VPN
B.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
C.Unlike VPWS, VPLS provides customers to view the network as an unshared overlay link or circuit
Answer: A

2. True or False? Multiple VPLS services can be offered over the same set of LSP tunnels?
A.True
B.False
Answer: A

3. Which SDP on R3 will MAC addresses be associated with for devices behind R2?
A.It depends if traffic is received via R4 or R1 from devices behind R2
B.The devices cannot communicate based on the configuration in the diagram so there will be no mac address association
C.Devices behind R2 will be associated with the sdp between R3 and R1
D.Devices behind R2 will be associated with the sdp between R3 and R4
Answer: C

4. Which of the following statements relating to VPLS are false?
A.A VPLS is a multipoint Layer 2 service
B.A VPLS allows multiple customer sites to be connected in a single bridged domain
C.A VPLS on a single node requires a Service Distribution Path
D.With VPLS Service provider can reuse their IP/MPLS infrastructure to offer multiple services
E.The VPLS switches traffic based on MAC address associated to the appropriate SAP
Answer: C

5. The behavior of VPLS can be best described by which of the following statements?
A.A frame should be sent only to the PE that connects to the target site of the frame whenever possible
B.A frame should be flooded as little as possible
C.Customer frames should be switched based on the destination MAC address
D.Only (a) and (b) are true
E.All of the above
Answer: E

6. Which of the following contributes to VPLS implementation over MPLS?
A.Connecting bridging-capable provider edge routers with a full mesh of MPLS LSP (label switched path) tunnels
B.Negotiating per-service VC labels using draft-Martini encapsulation
C.Replicating unknown and broadcast traffic in a service domain
D.Enabling MAC learning over tunnel and access ports
E.Using a separate forwarding information base (FIB) per VPLS service
F.All of the above
Answer: F

7. Which of the following statements is false?
A.VPLS is a bridged LAN service
B.VPLS provides L2 VPN services to CEs
C.VPLS is a point-to-point service where CEs are presented with point- to-point virtual circuits
D.CEs that are members of the same VPLS service instance communicate with each other as if they are connected via a bridged LAN
Answer: C

8. Which of the following functions must a PE router support when participating in a VPLS network? Choose all that apply.
A.MAC learning
B.Packet replication
C.Proxy ARP
D.Packet forwarding
E.Flood all frames with an unknown destination MAC address to all PE routers associated with that VPLS
Answer: A B D E

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