Free 4A0-109 Exam Dumps Preview

Question 1

Single choice

In a Bridged CO architecture, which of the following is TRUE?

1. A

   Subscriber sessions are terminated on the BNG.

2. B

   Multicast replication on the BSA is supported.

3. C

   IPv6 is supported.

4. D

   PPPoE is supported.

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Correct answerB

Question 2

Single choice

Where the following command can be configured trigger-packet dhcp dhcp6 pppoe?

1. A

   In the BSAN, under the VLAN setup.

2. B

   In the BSA, under a SAP of the VPLS.

3. C

   In the BNG, under a managed SAP of the IES.

4. D

   In the BNG, under a capture SAP of the VPRN.

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Correct answerB

Question 3

Single choice

In the wholesale/retail model, where is it beneficial to do authentication on the domain part of the username only?

1. A

   Retail VPRN service in the wholesale BNG

2. B

   Wholesale VPRN service in the wholesale BNG

3. C

   Wholesale VPRN service in the retail BNG

4. D

   Retail VPRN service in the retail BNG

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Correct answerB

Question 4

Single choice

How many queues per subscriber can be allocated using a high-speed Media Dependent Adapter (HS- MDA)?

1. A

   64 ingress or egress queues

2. B

   16 ingress and 16 egress queues

3. C

   8 ingress and 8 egress queues

4. D

   8 ingress or egress queues

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Correct answerC

Question 5

Single choice

Which of the following is NOT part of the aggregation network?

1. A

   BSA

2. B

   BSAN

3. C

   B-RAS

4. D

   BNG

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Correct answerB

Question 6

Single choice

Which of the following methods encapsulates IPv6 packets into an IPv4 tunnel?

1. A

   Dual-Stack Lite (DS-Lite)

2. B

   Native I Pv4/IPv6 dual-stack

3. C

   6RD

4. D

   Carrier-Grade NAT (CGN)

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Correct answerC

Question 7

Single choice

Which entity is used to identify the access loop to the PPPoE server (BNG)?

1. A

   Option 82

2. B

   Relay Tag

3. C

   Interface ID

4. D

   Loop ID

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Correct answerB

Question 8

Single choice

Assume a subscriber only requested one multicast group.

Which feature should be enabled on the BSAN to ensure the subscriber only receives data from the multicast group requested?

1. A

   IGMP proxy

2. B

   IGMP snooping

3. C

   MC replicator

4. D

   IGMP querier

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Correct answerB

Question 9

Single choice

Which of the following describes the port mode required to support ESM over MPLS on an Alcatel-Lucent 7750 SR?

1. A

   The port mode must be "access".

2. B

   The port mode must be "network" .

3. C

   The port mode must be "hybrid" .

4. D

   The port mode must be "pw-port" .

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Correct answerC

Question 10

Single choice

In numbered WAN RG, between which elements is a PPP session established?

1. A

   Subscriber-hosts and BNG

2. B

   RG and BNG

3. C

   RG and the BSA

4. D

   Subscriber-hosts and BSAN

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Correct answerB

Question 11

Single choice

Which application is NOT synchronized across two BNGs using MCS?

1. A

   PIM

2. B

   SRRP

3. C

   DHCP

4. D

   IGMP

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Correct answerA

Question 12

Single choice

Where and in which direction is a virtual-port typically instantiated?

1. A

   On the BNG, towards the Internet

2. B

   On the BNG, towards the BSAN

3. C

   On the BSAN, towards the BNG

4. D

   On the BSAN, towards the RG

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Correct answerB

Question 13

Single choice

What do IPv6CP Req/Ack messages use to identify the peer?

1. A

   Circuit ID

2. B

   Remote ID

3. C

   Interface ID

4. D

   SAPID

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Correct answerC

Question 14

Single choice

On which interface is SRRP activated?

1. A

   IES interface

2. B

   Network interface

3. C

   Subscriber interface

4. D

   Group interface

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Correct answerD

Question 15

Single choice

An Alcatel-Lucent 7750 SR has a subscriber interface configured with multiple subnets.

How is the subnet that is used for subscriber IP address allocation determined?

1. A

   The DHCP server assigns an IP address based on the gi-address configured on the RG.

2. B

   The DHCP server assigns an IP address based on the gi-address configured in the subscriber interface context on the BSA.

3. C

   The DHCP server assigns an IP address based on the gi-address configured in the group interface context.

4. D

   The DHCP server assigns an IP address based on the option 82 information inserted by the BSA.

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Correct answerC

Question 16

Single choice

Which of the following is correct in a VLAN per all services for all subscribers?

1. A

   One port per BSAN

2. B

   One port per service

3. C

   One SAP per service

4. D

   One SAP per BSAN

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Correct answerD

Question 17

Single choice

Click on the exhibit.

In an ESM environment, a static host is defined with an IP address but no MAC address. The command "show service id 100 subscriber-hosts" shows the MAC address marked as "Unknown" and it is in a "Not Forwarding" state.

What could be the reason?

1. A

   The static-host MAC address has not been configured.

2. B

   The static-host will not be able to forward traffic and will drop all packets.

3. C

   The MAC address has not been learned yet.

4. D

   The static-host will not be able to forward traffic with an unknown MAC address.

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Correct answerC

Question 18

Single choice

Which of the following were NOT roles of a traditional BNG?

1. A

   Logical termination of PPP sessions

2. B

   Authentication of subscribers using 802.1x

3. C

   Default gateway to the Internet

4. D

   Enforce QoS policies

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Correct answerB

Question 19

Single choice

Which of the following sources can NOT be used to retrieve parameters required to instantiate a dynamic subscriber host?

1. A

   DNS

2. B

   LUDB

3. C

   DHCP

4. D

   Python

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Correct answerA

Question 20

Single choice

Which of the following configuration elements is used to divert subscriber traffic to the AA-ISA?

1. A

   Application group

2. B

   Application profile

3. C

   Application filter

4. D

   Application QoS policy

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Correct answerB

Question 21

Single choice

What is the correct command to map in the SAP-ingress (sap-ingress id: 100) and the default queue (queue id: 1) to the scheduler-policy?

1. A

   Configure qos sap-ingress 100 queue 1 parent <scheduler-policy-name>

2. B

   Configure qos sap-ingress 100 queue 1 map <scheduler-policy-name>

3. C

   Configure qos sap-ingress 100 queue 1 <schedu!er-policy-name>

4. D

   Configure qos sap-ingress 100 queue 1 map scheduler-policy <scheduler-policy-name>

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Correct answerA

Question 22

Single choice

What is the main limitation of the basic subscriber management?

1. A

   Limited bandwidth per SAP

2. B

   Limited SLAs per-subscriber per SAP

3. C

   Limited number of queues

4. D

   Limited ACL policies

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Correct answerB

Question 23

Single choice

What is the benefit of using ESM over MPLS?

1. A

   The BNG group interface can be protected with MPLS Fast Reroute.

2. B

   Subscriber sessions can be backhauled over an MPLS network directly into the BNG.

3. C

   It allows for the creation of an ePipe from the BSAN to the BNG. with the MPLS spoke SDP terminating directly on the group interface.

4. D

   It removes the need for dual-homing the BSAN to two BNGs to protect subscriber sessions.

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Correct answerB

Question 24

Single choice

Which network element will add the PPPoE Relay Tag?

1. A

   RG

2. B

   BSAN

3. C

   BSA

4. D

   BNG

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Correct answerB

Question 25

Single choice

Which technique can be used to prevent direct L2 subscriber-to-subscriber communication?

1. A

   Anti-spoofing

2. B

   MAC-pinning

3. C

   Local-proxy ARP

4. D

   Split horizon group

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Correct answerD

Question 26

Single choice

Which of the following methods encapsulates IPv4 packets into an IPv6 tunnel?

1. A

   Dual-Stack Lite (DS-Lite)

2. B

   CGN-Carrier Grade NAT

3. C

   6RD

4. D

   IPv4/IPv6 native dual-stack

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Correct answerA