Question 1

Which of the following statements about Spanning Tree Protocol is true?

Options :

A : The switch with the lowest priority becomes the root.

B : The switch with the highest priority becomes the root.

C : The switch with the lowest MAC address always becomes the root.

D : The switch with the highest MAC address always becomes the root.

Answer: A

Question 2

In IEEE 802.1ag, which two key functions are configured on bridge ports (SAPs and SDPs) to support CFM messages? (Choose 2)

Options :

A : MEP

B : MAP

C : MIP

D : MUP

Answer: A,C

Question 3

How is the aggregator attribute handled with 32-bit AS numbers?

Options :

A : With the same method and attribute as 16-bit AS numbers.

B : With the same method as 16-bit AS numbers, but using the AS4_Aggregator attribute.

C : Aggregation is not yet supported with 32-bit AS numbers.

D : By using a dummy value of 23456 in the 16-bit AS aggregator field. This value lets the router know it needs to read the 32-bit AS number that is contained in the nextTLV.

Answer: B

Question 4

Click on the exhibit below.

Other-Image-2a3f72564-7b70-4c6b-a005-15ea2880f38c

Assume a CE router is connected to the SAP of each PE. The arp cache of all CE routers is empty and the FDB for VPLS 300 is empty. The CE router connected to PE-A initiates a ping towards the CE router connected to PE-C. The ping is successful. Which of the following statements are true? (Choose 2)

Options :

A : The FDB on PE-A will contain entries for all CE routers.

B : The FDB on PE-B will contain an entry for the CE router connected to PE-A.

C : The FDB on PE-B will contain an entry for all CE routers.

D : The FDB on PE-C will contain entries for the CE router connected to PE-A and the CE router connected to PE-C.

Answer: B,D

Question 5

What are the benefits of a hierarchical VPLS architecture? (Choose 3)

Options :

A : Increases scalability

B : Reduces the FDB size within a VPLS instance

C : Reduces replication and bandwidth utilization from the MDU device to the core network

D : Easier to manage

E : Reduces the routing table size

Answer: A,C,D

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