Question 1

Click on the exhibit below.

Based on the output below which of the following statements is true? (Choose 2)

Options :

A : VPLS1500 is a user VPLS

B : VPLS 1500 is management VPLS.

C : Spanning tree BPDUs for the management VPLS are tagged.

D : Spanning tree BPDUs for the management VPLS are untagged.

Answer: A,D

Question 2

What configuration is required on the CE device when using MC-LAG?

Options :

A : The CE must be configured with an MC-LAG to both PE devices.

B : The CE must be configured with LACP in active mode.

C : There is no configuration required on the CE.

D : The CE must be an Alcatel-Lucent 7750 SR.

Answer: B

Question 3

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

Question 4

Which of the following needs to be considered when designing Ethernet networks with redundancy?

Options :

A : Processing the TTL takes extra time

B : MAC learning rate is doubled.

C : FDB size is doubled

D : Requires a protocol to remove loops

Answer: D

Question 5

If a management VPLS is administratively disabled what will be the status of the associated user VPLS SAPs?

Options :

A : Regular semantics will apply. It will be as if the SAP doesn't belong to a management VPLS.

B : All user VPLS SAPs will be disabled/pruned

C : It is not possible to administratively disable a management VPLS

D : Spanning tree will be automatically enabled on the user VPLS SAPs.

Answer: B

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