Free 4A0-102 Questions for Alcatel-Lucent Border Gateway Protocol 4A0-102 Exam as PDF & Practice Test Engine

Exam Code/Number: 4A0-102
Exam Name/Title: Alcatel-Lucent Border Gateway Protocol
Certification Provider: Alcatel-Lucent
Corresponding Certification: Alcatel-Lucent Certifications

Exam Questions: 152
Updated On: Jun 24, 2026

Question #1

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

A. A single-homed AS can be either transit or non-transit

B. A single-homed AS is also known as a leaf AS.

C. A single-homed AS is also known as a stub AS.

D. A single-homed AS uses either the ISP AS number or a private AS number.

Discussion 0

Correct Answer: A Vote an answer

Question #2

Upon the successful establishment of a TCP session between peers, what type of BGP message is exchanged?

A. Update

B. OpenSent

C. Keepalive

D. Open

E. Notification

Discussion 0

Correct Answer: D Vote an answer

Question #3

Which of the following is TRUE if the state of one BGP neighbor shows Active?

A. The router received an Open message with the correct parameters.

B. The router is actively exchanging updates with that neighbor.

C. The neighbor will send a Keepalive message.

D. The router is trying to initiate a TCP connection to that neighbor.

Discussion 0

Correct Answer: D Vote an answer

Question #4

Click the exhibit.

Which of the following is a valid confederation configuration for Router R2?

A. Option B

B. Option A

C. Option D

D. Option C

Discussion 0

Correct Answer: D Vote an answer

Question #5

Click the exhibit.

Router R3 is configured with an import policy to reject updates with an AS Path matching the regular expression ".+
65540". Which of the following regarding updates originating in AS 65540 is TRUE?

A. Router R3 accepts updates received from router R1 and rejects updates transited through router R2.

B. Router R3 accepts updates from both routers R1 and R2.

C. Router R3 rejects all updates originating in AS 65540.

D. Router R3 accepts updates transited through router R2 and rejects updates received from router R1.

Discussion 0

Correct Answer: A Vote an answer

Question #6

When an Alcatel-Lucent 7750 SR receives a BGP route with an AS Path loop, what action is taken by default?

A. The route is flagged as invalid and placed in the LOC-RI

B. The route is flagged as invalid and placed in the RIB-Out.

C. The route is ignored.

D. The route is flagged as invalid and placed in the RIB-In.

Discussion 0

Correct Answer: D Vote an answer

Question #7

Why is a full mesh of iBGP peers required?

A. To ensure proper route propagation inside a transit AS.

B. To maximize control plane scalability.

C. To ensure that all routers run iBGP inside a transit AS.

D. To ensure that all routers are directly connected.

Discussion 0

Correct Answer: A Vote an answer

Question #8

Click the exhibit.

After router A receives the BGP update for the 10.3.3.0/24 prefix, which routers will the route be propagated to?

A. All routers with which it has a BGP session, except the router it received the update from, which is router

B. Only eBGP neighbors.

C. All routers with which it has a BGP session.

D. All routers with which it has a BGP session, except the router it received the update from, which is router

E. All routers with which it has a BGP session, except the router it received the update from, which is router

Discussion 0

Correct Answer: B Vote an answer

Question #9

Click the exhibit.

Assume all router-IDs are properly configured, and IPv6 link-local addresses are used to establish all eBGP sessions.
Given the following iBGP configuration on router A, what is the Next Hop for prefix 2001:DB8:A:401::1/128 on router
B?

A. The IPv6 link-local address of the router A interface towards router D.

B. The IPv6 global address of router A.

C. The IPv6 global address of router

D. The IPv6 link-local address of the router D interface towards router

Discussion 0

Correct Answer: B Vote an answer

Question #10

Which of the following statements regarding the Internet is FALSE?

A. It is a continuous and interconnected set of public IP networks, advertised and shared across the globe.

B. It is a network that allows any Internet service provider to reach every other Internet service provider in the world.

C. It is a settlement-free global network that provides interconnection between Internet service providers.

D. It is a global network relying on interconnections provided by Internet service providers.

Discussion 0

Correct Answer: C Vote an answer

Question #11

Click the exhibit.

An update travels from AS 137000 to AS 135000, traversing both 32-bit and 16-bit AS Paths. What AS Path is seen by
AS 200?

A. 200 140000 137000

B. 137000 140000

C. 23456 23456

D. 140000 137000

Discussion 0

Correct Answer: C Vote an answer

Question #12

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.

Discussion 0

Correct Answer: A Vote an answer

Question #13

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. Clear router bgp protocol

B. Clear router bgp neighbor <ip-address> soft

C. Configure router bgp shutdown

D. Clear router bgp neighbor <ip-address> soft-inbound

Discussion 0

Correct Answer: D Vote an answer

Question #14

Click the exhibit.

Given the following configuration of router R1, what can be said about the function of each of AS 65540s routers?

A. Router R1 is a route reflector with clients R2, R3 and R4.

B. Router R1 is a route reflector with clients R3 and R4.

C. Routers R1 and R2 are redundant route reflectors with clients R3 and R4.

D. Routers R3 and R4 are route reflectors with clients R1 and R2.

Discussion 0

Correct Answer: B Vote an answer

Free 4A0-102 Questions for Alcatel-Lucent Border Gateway Protocol 4A0-102 Exam as PDF & Practice Test Engine

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