4A0-102 by Alcatel-Lucent Valid Free Exam Practice Test

Question 1

Click on the exhibit.

AS 65540 is using MPLS to provide BGP shortcuts for its iBGP routing. AS 65541 is advertising prefix 192.168.1.0/27
into BGP. Which routers have the BGP update for the advertised prefix in their BGP table?

A. Routers R1, R2, R3 and R4 only. B. Routers R1, R2, R3, R4 and R5. C. Routers R1and R4 only. D. Routers R1, R4 and R5 only.

Correct Answer: D

Question 2

What will happen if an update is received with an unrecognized optional non-transitive attribute?

A. The router will not accept the update and send a notification. B. The router will accept the update and propagate the attribute. C. The router will accept the update and ignore the attribute. D. The router will accept the update and send a notification.

Correct Answer: C

Question 3

Click on the exhibit.

AS 65540 is using MPLS to provide BGP shortcuts for its iBGP routing. Which routers must be configured with the
"configure router bgp igp-shortcuts rsvp-te" command?

A. Routers R6, R1, R4 and R5. B. Routers R2 and R3. C. Routers R1, R2, R3 and R4. D. Routers R1and R4.

Correct Answer: D

Question 4

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

A. There are no defined private AS numbers; there are only private IP addresses. B. 64496 - 64511 C. 1 - 56319 D. 64512-65534 E. 64513-65535

Correct Answer: D

Question 5

Which of the following about a single-homed AS is FALSE?

A. A single-homed AS uses either the ISP AS number or a private AS number. B. A single-homed AS is also known as a leaf AS. C. A single-homed AS can be either transit or non-transit D. A single-homed AS is also known as a stub AS.

Correct Answer: C

Question 6

Which of the following statements about the BGP Advertise External feature is FALSE?

A. It improves convergence times and allows for better load sharing. B. It supports both IPv4 and IPv6. C. It modifies the BGP advertisement logic. D. It allows a router to advertise multiple external paths for a single prefix.

Correct Answer: D

Question 7

Click the exhibit.

Router R2 receives a route to 192.168.1.0/27 from router R4, and sets the local preference to 110. Router R1 receives
a route to 192.168.1.0/27 from router R3, and sets the local preference to 80. Both ASs have a full iBGP mesh. What
path does traffic destined to 192.168.1.0/27 take from router R1?

A. R1-R3-R4-R8 B. R1-R2-R4-R8 C. R1-R2-R4-R3-R8 D. R1-R3-R8

Correct Answer: B

Question 8

Which of the following prefix-lists is the most specific match for prefixes 192.168.64.1/20 and
192.168.32.5/19?

A. Prefix 192.168.0.0/19 longer. B. Prefix 192.168.0.0/18 longer. C. Prefix 192.168.96.0/19 longer. D. Prefix 192.168.0.0/17 longer.

Correct Answer: D

Question 9

Which of the following best describes the relationship between locally configured policies and the direction of traffic?

A. Import policies affect the way the local AS sends traffic, while export policies affect the way it receives traffic. B. Both import and export policies affect the way the local AS sends traffic, but not the way it receives traffic. C. Import policies affect the way the local AS receives traffic, while export policies affect the way it sends traffic. D. Both import and export policies affect the way the local AS receives traffic, but not the way it sends traffic.

Correct Answer: A

Question 10

Which of the following statements regarding the Originator_ID attribute is TRUE?

A. A BGP router ignores an update that contains its own BGP router ID as Originator_I B. The BGP router that originates an update sets the Originator_ID. C. Both confederation and route reflector topologies use the Originator_ID. D. The Originator_IDis set to the ClusterJD of the advertising router reflector.

Correct Answer: A

Question 11

Click the exhibit.

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

A. ISP 3 is downstream from ISP 1 and is expected to push more traffic toward ISP 1 than it pulls from it. B. ISP 3 is downstream from ISP1 and is expected to pull more traffic from ISP 1 than it pushes toward it. C. ISP 1 is downstream from ISP 3 and is expected to push more traffic toward ISP 3 than it pulls from it. D. ISP 1 is downstream from ISP 3 and is expected to pull more traffic from ISP 3 than it pushes toward it.

Correct Answer: D

Question 12

The user of an Alcatel-Lucent 7750 SR wants to see the effect of changing an import policy immediately. What is the
best command to force re-evaluation of the import policy with minimal impact?

A. Configure router bgp shutdown B. Clear router bgp neighbor <ip-address> soft C. Clear router bgp neighbor <ip-address> soft-inbound D. Clear router bgp protocol

Correct Answer: C

Question 13

Which of the following is FALSE regarding the 16-bit public autonomous system numbers?

A. They are assigned by the ISPs for enterprise networks. B. They are used when connecting ASs on the Internet. C. They are allocated to the RIRs by ICANN/IAN D. They range from 1 to 56319.

Correct Answer: A

Question 14

Which of the following regarding BGP confederations is FALSE?

A. Confederations can be used to subdivide ASs that have a large number of BGP speakers into smaller domains. B. A confederation is a collection of Autonomous Systems advertised as a single AS number to BGP speakers outside
the confederation. C. A full mesh of intra-confederation eBGP sessions is required between the member ASs. D. Each member AS must either maintain a full mesh of iBGP sessions, or use route reflection.

Correct Answer: C

Alcatel-Lucent Border Gateway Protocol - 4A0-102 Exam Practice Test