Question 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
B. VPLS is a bridged LAN service provided to a set of CEs that are members of a L2 VPN
C. 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
D. Unlike VPWS, VPLS provides customers to view the network as an unshared overlay link or circuit

Answer: A

Question 2.
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

Question 3.
Which of the following statements relating to VPLS are false?

A. A VPLS is amultipoint 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

Question 4.
True or False? Multiple VPLS services can be offered over the same set of LSP tunnels?

A. True
B. False

Answer: A

Question 5.
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

Question 6.
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

Question 7.
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

Question 8.
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 nomac address association
C. Devices behind R2 will be associated with thesdp between R3 and R1
D. Devices behind R2 will be associated with thesdp between R3 and R4

Answer: C

Question 9.
Select the command from the list below that produced the following output.
 
A. oam svc-ping 20.20.20.20 service 10 local-sdp remote-sdp
B. oam sdp-ping 10 resp-sdp 10
C. oam svc-ping 20.20.20.20 service 10 local-sdp
D. oam svc-ping 10.10.10.10 service 10 local-sdp remote-sdp
E. oam svc-ping 10.10.10.10 service 10 local-sdp

Answer: A

Question 10.
Based on the following output what will the vc-id be of any mesh-sdp bound to this service?
 

A. 9000
B. 1514
C. 1000
D. 0

Answer: C

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