Alcatel-Lucent Triple Play Services - 4A0-109 Exam Questions [2026]

QUESTION NO: 1
Which of the following describes the discovery stage of the PPPoE protocol?

A. Network control protocol options are exchanged between all access concentrators. B. The MAC addresses of the access concentrators are determined and a single EAPOL message is sent by the client to start the session stage. C. A single access concentrator is chosen based on the AC-name or the services offered. D. The unicast IP addresses of all access concentrators are determined and LCP information is exchanged.

Correct Answer: C

QUESTION NO: 2
To support dual stack subscribers, what is the minimum chassis-mode on the Alcatel-Lucent 7750 SR?

A. Chassis-mode d B. Chassis-mode a C. Chassis-mode b D. Chassis-mode c

Correct Answer: D

QUESTION NO: 3
Which application is NOT synchronized across two BNGs using MCS?

A. IGMP B. PIM C. SRRP D. DHCP

Correct Answer: B

QUESTION NO: 4
Where and in which direction is a virtual-port typically instantiated?

A. On the BSAN, towards the BNG B. On the BNG, towards the Internet C. On the BNG, towards the BSAN D. On the BSAN, towards the RG

Correct Answer: C

QUESTION NO: 5
Which network element will add the PPPoE Relay Tag?

A. BSAN B. RG C. BSA D. BNG

Correct Answer: A

QUESTION NO: 6
Which entity is used to identify the access loop to the PPPoE server (BNG)?

A. Relay Tag B. Interface ID C. Loop ID D. Option 82

Correct Answer: A

QUESTION NO: 7
The user-name-format command will allow different formats for the authentication request sent to the radius server. What is the default value of the user-name-format?

A. Circuit ID B. MAC address C. ASCII-converted-circuit-id D. Tuple

Correct Answer: B

QUESTION NO: 8
What is the purpose of the anti-spoofing filter?

A. Filter upstream traffic B. Prevent direct subscriber-to-subscriber communication C. Anti-virus protection D. Prevent the use of fake IP addresses

Correct Answer: D

QUESTION NO: 9
Which of the following is NOT a multi-chassis synchronization operation?

A. Local-delete B. Global-delete C. Modify D. Add

Correct Answer: C

QUESTION NO: 10
Which DHCP message is used to populate the anti-spoofing table?

A. DHCP Offer B. DHCP Request C. DHCP Ack D. DHCP Discover

Correct Answer: C

QUESTION NO: 11
Which of the following about BSAN handling of option 82 information is TRUE?

A. The BSAN inserts option 82 information towards the DHCP server and removes it towards the subscriber. B. The BSAN transparently passes option 82 information sent from the RG towards the DHCP server. C. The BSAN removes option 82 information towards the DHCP server and inserts it towards the subscriber. D. The BSAN inserts option 82 information towards the DHCP server and translates it to option 83 towards the subscriber.

Correct Answer: A

QUESTION NO: 12
MCS is not required on a BNG for which redundancy mechanism?

A. VRRP B. MC-ring C. MC-LAG D. SRRP

Correct Answer: A

QUESTION NO: 13
A subscriber-host gets an IP address from the RG using SLAAC and all prefixes are centrally managed.
How does the RG receive the correct information?

A. The RG receives the IA_PD in a DHCPv6 message. B. The RG receives the IA_NA in a DHCPv6 message. C. The RG receives the prefix information encapsulated in a DHCPv4 message. D. The RG receives the prefix from the BNG using SLAAC.

Correct Answer: A

QUESTION NO: 14
Which of the following elements is part of the home network?

A. BSAN B. BSM C. RG r D. BNG

Correct Answer: C