Question 1

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 2

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 3

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 4

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 5

How is it possible for multiple services to be carried over the same MPLS LSPs?

Options :

A : Multiple SDPs must be configured and bound to the LSPs for this to be possible.

B : It is not possible to carry multiple services over the same MPLS LSPs.

C : A vc-label is signaled per service.

D : The vc-id is part of the data plane and maps the traffic to the appropriate service.

Answer: A

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