Alcatel-Lucent Border Gateway Protocol (4A0-102) Free Practice Test

Question 1

Which of the following statements regarding BGP shortcuts is FALSE?

A. The transit routers need to support LDP or RSVP-TE LSPs.

B. Edge and transit routers need to be configured with BGP.

C. MPLS tunnels are used to carry transit traffic across the network.

D. A full mesh of iBGP peering sessions is not required,

Correct Answer: B

Question 2

Which of the following regarding "well-known discretionary'' BGP attributes is TRUE?

A. They are discarded if not recognized by the recipient.

B. They must be recognized by all peers and included in all BGP updates.

C. The receiving router sends a notification if a well-known discretionary attribute is not present in an update.

D. They must be recognized by all peers and optionally included in BGP updates.

Correct Answer: D

Question 3

Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following
BGP export policy?

A. "client2" routes will be only tagged with communities 'East'' and "South".

B. "client2" routes will only be tagged with community "South".

C. "client2" routes will be tagged with community "East".

D. "client2" routes will be rejected.

Correct Answer: A

Question 4

What kind of attribute is the aggregator?

A. Well-known mandatory

B. Optional non-transitive

C. Well-known discretionary

D. Optional transitive

Correct Answer: D

Question 5

Click the exhibit.

Given that ISP 1 and ISP 2 are Tier 2 providers, and that ISP 3 and ISP 4 are Tier 1 providers, what is the most likely
relationship between the ISPs?

A. ISP 1 and ISP 2 have a private transit relationship, while ISP 3 and ISP 4 have a public transit relationship.

B. ISP 1 and ISP 2 have a public transit relationship, while ISP 3 and ISP 4 have a private transit relationship.

C. ISP 1 and ISP 2 have a public peering relationship, while ISP 3 and ISP 4 have a private peering relationship.

D. ISP 1 and ISP 2 have a private peering relationship, while ISP 3 and ISP 4 have a public peering relationship.

Correct Answer: C

Question 6

An Alcatel-Lucent 7750 SR is configured with a policy to export directly-connected networks to BGP. Which of the
following commands verifies that the export was successful?

A. show router bgp routes

B. show router bgp routes <prefix> hunt

C. show router bgp neighbor <ip-address> received-routes

D. show router route-table

Correct Answer: B

Question 7

Click the exhibit.

Assuming that none of the routers within AS 65200 is configured with next-hop-self", what will the BGP update for the
192.168.0.1/27 prefix contain when it arrives at router B?

A. AS Path of 65100, Next Hop of router E.

B. AS Path of 65200 65100, Next Hop of router E.

C. AS Path of 65200 65100, Next Hop of router

D. AS Path of 65100, Next Hop of router A.

Correct Answer: A

Question 8

Click the exhibit.

Routers RR1 and RR2 are route reflectors with the same Cluster-ID. When the update for prefix
192.168.1.0/27 is received at router RA2, what are the Originator_ID and Cluster_List attributes?

A. Neither the Originator_ID nor the Cluster_List is set.

B. Originator_ID of RR1; and Cluster_List of 10.16.10.1.

C. Originator_ID of RX; and Cluster_List of 10.16.10.1.

D. Originator_ID of RR1; and the Cluster_List is not set.

Correct Answer: A

Question 9

Click the exhibit.

Which of the following about the relationship between ISP 1 and ISP 3 is TRUE?

A. ISP 3 is downstream from ISP1 and is expected to pull more traffic from ISP 1 than it pushes toward it.

B. ISP 3 is downstream from ISP 1 and is expected to push more traffic toward ISP 1 than it pulls from it.

C. ISP 1 is downstream from ISP 3 and is expected to pull more traffic from ISP 3 than it pushes toward it.

D. ISP 1 is downstream from ISP 3 and is expected to push more traffic toward ISP 3 than it pulls from it.

Correct Answer: C

Question 10

What kind of BGP attribute is the Local Preference?

A. Optional non-transitive attribute.

B. Optional transitive attribute.

C. Well-known mandatory attribute.

D. Well-known discretionary attribute.

Correct Answer: D

Question 11

From what range are 16-bit private AS numbers selected?

A. 64512-65534

B. 64513-65535

C. 1 - 56319

D. There are no defined private AS numbers; there are only private IP addresses.

E. 64496 - 64511

Correct Answer: A

Question 12

Click the exhibit.

Assuming a full iBGP mesh in ISP 1, how does router R1 in ISP 1 handle a BGP update received from ISP 2?

A. The update is sent to all routers in ISP 1.

B. The update is sent to routers R2 and R3 in ISP 1.

C. The update is sent to router R2 in ISP 1.

D. The update is sent to routers R2 and R3 in ISP 1, and to router R3 in ISP 2.

Correct Answer: A

Question 13

Click the exhibit.

An update travels from AS 135000 to AS 137000, traversing both 32-bit and 16-bit AS paths. What will the AS Path be
when the update reaches AS 137000?

A. 140000 23456 135000

B. 135000 200 140000

C. 140000 200 135000

D. 137000 140000 200 135000

Correct Answer: C

Question 14

What kind of BGP attribute is the Multi_Exit_Disc?

A. Optional non-transitive attribute.

B. Optional transitive attribute.

C. Well-known mandatory attribute.

D. Well-known discretionary attribute.

Correct Answer: A

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Alcatel-Lucent Border Gateway Protocol (4A0-102) Free Practice Test