Question 1

If the max remote-age timer of a B-VPLS is reached, what happens to the remotely learned MAC addresses in the l-VPLS service?

Options :

A : There is no effect. The MAC addresses for the l-VPLS age out independently of the aging of B-VPLS addresses

B : The MAC addresses for the l-VPLS will age out immediately following the remote-age out of the backbonemacs of the B-VPLS

C : By default, the remote-age timer of the B-VPLS is configured to 0 and addresses do not age out. The lVPLS uses its own timer.

D : The same timer is used for B-VPLS and l-VPLS addresses on the node.

Answer: B

Question 2

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

Options :

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.

Answer: D

Question 3

Click on the exhibit below. 4-A0-105-page64-image35 A new router named PE-D is to be directly connected to PE-C and is required to be added to the existing VPLS300. The design requires the least amount of signaling, the least amount of configuration changes for existingsites and the new site has to have access to all existing sites. How should the new site be added to VPLS 300?

Options :

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

Question 4

How is the Primary Bridge chosen in a VPLS?

Options :

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

B : The PE devices participating in the VPLS mesh determine which bridge is closest to Root Bridge. This bridge becomes the Primary Bridge.

C : The PE devices participating in the VPLS mesh determine which bridge has the lowest bridge-id. This bridge becomes the Primary Bridge.

D : The PE devices participating in the VPLS mesh determine which bridge is the Root Bridge. This becomes the Primary Bridge.

Answer: B

Question 5

Consider a large metro-to-metro VPLS network interconnected with a mesh of mesh-SDPs. Which of the following statements does NOT apply to this situation?

Options :

A : Bandwidth and replication inefficiency can occur on inter-metro links if there is a lot of multicast traffic

B : The number of control sessions grows exponentially in a fully meshed network

C : Spanning-tree is required to prevent loops when using mesh SDPs on the inter-metro links.

D : Network touches increase with each node added to the mesh.

Answer: C

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