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4A0-108 Sample Questions Answers

Questions 4

Which protocol is used to establish the S-PMSI in Draft Rosen?

Options:

A.

PIM DM

B.

PIM SSM

C.

PIM ASM

D.

Either PIM SSM or PIM ASM

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Questions 5

What are the first two actions a router performs after PIM is enabled?

Options:

A.

BSR election followed by DR election.

B.

DR election followed by PIM Hello messages.

C.

DR election followed by BSR election.

D.

BSR election followed by PIM Hello messages.

E.

PIM Hello messages followed by BSR election.

F.

PIM Hello messages followed by DR election.

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Questions 6

What is the DATA_DELAY_INTERVAL?

Options:

A.

It is the delay before the source PE switches traffic from the I-PMSI to the S-PMSI.

B.

It is the delay before the source PE sends MDT Join TLVs.

C.

It is the delay before the source PE switches traffic from the S-PMSI to the I-PMSI when traffic rate drops below the threshold.

D.

It is the delay before the receiver PE prunes the S-PMSI.

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Questions 7

Click the exhibit.

What happens when Host 2 issues an IGMP report to join a group?

Options:

A.

Both Router A and Router B get this IGMP report; Router B propagates a PIM join toward the core network.

B.

Both Router A and Router B get this IGMP report, and both propagate a PIM join toward the core network.

C.

Only Router A gets this IGMP report and propagates a PIM join toward the core network.

D.

Only Router A gets this IGMP report, but no further action is taken, as Router A is not the PIM DR.

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Questions 8

Click the exhibit.

Assume the I-PMSI group address is G. How many PIM (S,G) entries are on the P (RP) router?

Options:

A.

Only one, and S is PE1.

B.

Only one, and S is the MC source server's IP address.

C.

None, as RPonly maintains (*,G) state.

D.

Three, and S is PE1, PE2 and PE3 respectively.

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Questions 9

Why should the anycast RP address be a non-system address of a router?

Options:

A.

Alcatel-Lucent 7750 SR configuration does not permit using the system address for an anycast RP address.

B.

The system address of a router must be a unique address within the domain, while the anycast address is configured on multiple routers within the domain.

C.

PIM will not be able to establish its signaling sessions if the anycast address uses the system address.

D.

Best practice is to use the system address as the anycast address for PIM.

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Questions 10

Which of the following pairs correctly completes the sentence below?

When Draft Rosen is deployed, PEs exchange CEs' unicast routing information via_________and exchange CEs'multicast group information via____________.

Options:

A.

MP-BGP, PIM

B.

MP-BGP, MP-BGP

C.

mLDP, PIM

D.

MP-BGP, mLDP

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Questions 11

Which of the following statements about MLD snooping is false?

Options:

A.

MLD snooping enables switches to forward multicast data to specific hosts that want to receive the data

B.

MLD snooping can co-exist with IGMP snooping in the same VPLS service

C.

Once MLD snooping is enabled, the switch can snoop both MLDv1 and MLDv2 messages

D.

MLD snooping snoops MLD report and done messages, not query messages

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Questions 12

Which of the following is a characteristic of a packet with a destination address in the Local Network Control Block address range?

Options:

A.

A packet with this address is always forwarded throughout the multicast routing domain but never forwarded outside the multicast routing domain

B.

A packet with this address can only be processed by a router

C.

A packet with this address is never forwarded beyond the local link unless the TTL is greater than 1

D.

A packet with this address is never forwarded beyond the local link regardless of the TTL

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Questions 13

What is the multicast MAC address for IPv6 multicast address FF1E:: 1234:5678?

Options:

A.

33:33:12:34:56:78

B.

33:33:FF:34:56:78

C.

33:33:FE:34:56:78

D.

33:33:FF:FE:56:78

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Questions 14

Which of the following is a name for PIM Sparse Mode operation that utilizes an RP?

Options:

A.

RP Multicast

B.

Any Source Multicast

C.

Source Based Multicast

D.

Source Specific Multicast

E.

All Sender Multicast

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Questions 15

Is a static RP configuration functional without an associated address group specification?

Options:

A.

Yes

B.

No

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Questions 16

What will be the immediate action of the last hop router on receipt of an IGMP version 2 leave message?

Options:

A.

It will send a PIM (*, G) prune to the RP

B.

It will send a PIM (S, G) prune to the source

C.

It will send a PIM (*, G) prune to the RP and a PIM (S, G) prune to the source

D.

It will issue an IGMP Group Specific Query

E.

It will issue an IGMP General Query

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Questions 17

If a router receives a packet addressed to a broadcast destination, it will:

Options:

A.

Drop the packet by default

B.

Forward the packet by default

C.

Flood the packet to all ports except the receiving port

D.

Flood the packet to all ports including the receiving port

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Questions 18

Which of the following PIM messages are sent via unicast? (Choose two)

Options:

A.

(*.G) Join/Prune

B.

(S.G) Join/Prune

C.

Register

D.

Candidate-RP-Advertisement

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Questions 19

Refer to the following exhibit.

Assume all links have an equal metric in the IGP. Receiver 2 has joined the multicast group and the source is sending. As a result of Router F switching to the Source Path Tree, what message will be generated by Router D in the direction of Router E?

Options:

A.

PIM(*, G)Join

B.

IGMP(*, G)Join

C.

PIM Hello

D.

PIM (S, G)RP-bit prune

E.

PIM (*, G)RP-bit prune

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Questions 20

Which of the following PIM messages is sent to RP via unicast?

Options:

A.

(*, G) Join/Prune

B.

(S, G) Join/Prune

C.

Register

D.

Candidate-RP-Advertisement

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Questions 21

Click the exhibit.

The interface's IGP metric is as shown, and PIM is using the unicast table for the RPF-check. What happens when Router B receives a register message on its interface facing Router A?

Options:

A.

Router B discards the register message, as the RPF-check fails.

B.

Router B forwards the register message to Router D (RP) according to its routing table.

C.

Router B forwards the register message out of all the interfaces in its (',239.1.1.1) entry's outgoing interface list.

D.

Router B forwards the register message out of all the interfaces in its (192.168.1.1,239.1.1.1) entry's outgoing interface list.

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Questions 22

Which of the following about the use of BGP A-D in a MVPN service is TRUE?

Options:

A.

If the I-PMSI is signaled by BGP A-D, then the S-PMSI must be signaled by BGP A-D.

B.

If the I-PMSI is signaled by PIM, then the S-PMSI must be signaled by BGP A-D.

C.

Customer group membership must be signaled by BGP A-D.

D.

Customer group membership must be signaled by BGP A-D or PIM.

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Questions 23

What is the default action taken by an Alcatel-Lucent 7750 SR when it receives a packet addressed to a broadcast destination?

Options:

A.

The router drops the packet.

B.

The router forwards the packet.

C.

The router floods the packet to all ports except the receiving port.

D.

The router floods the packet to all ports, including the receiving port.

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Questions 24

Which of the following services is provided by the use of PIM as a multicast routing protocol?

Options:

A.

Authentication

B.

Guaranteed delivery

C.

Device security

D.

Prevention of forwarding loops

E.

Prevention of Denial of Service attacks

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Questions 25

Which of the following are characteristics of the one-to-many model of multicast data delivery? (Choose two)

Options:

A.

Receivers are generally unknown by the source.

B.

Receivers are generally known by each other.

C.

It is well suited for applications in which the receivers provide feedback to each other and the source.

D.

There is a single data flow for each group on the source segment.

E.

All devices are potentially capable of generating multicast data.

F.

It is well suited for applications such as video on demand, where each source sends a separate data stream to each of the many different receivers.

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Questions 26

Which operation is performed by an interested PE upon receiving an MDT Join TLV?

Options:

A.

The PE sends an (S, G) PIM Join with GRE encapsulation.

B.

The PE sends an (S, G) PIM Join with no encapsulation.

C.

The PE sends a (*, G) PIM Join with GRE encapsulation.

D.

The PE sends a (*, G) PIM Join with no encapsulation.

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Questions 27

Click the exhibit.

The network administrator of 2001 ;DB8:FEED::/64 wants to embed an RP for the network. The RP's address is 2001:DB8:FEED::7. Which of the following multicast address ranges would suit this purpose? (The exhibit shows the group-to-RP mapping for your reference only.)

Options:

A.

FF7x:730:2001:DBS:FEED::/96 (x is scope)

B.

FF7x:730:2001:DBS:FEED::/80 (x is scope)

C.

FF7x: 740:2001:DB8:FEED::/96 (x is scope)

D.

FF7x:740:2001:DB8:FEED::/80(x is scope)

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Questions 28

An IGMP version 3 receiver signals EXCLUDE mode report with an empty EXCLUDE list. What does this indicate?

Options:

A.

This is the initial join message; a list of sources to exclude will follow.

B.

The receiver is willing to receive traffic from any source.

C.

The receiver has received the query, but it does not wish to join any group.

D.

The receiver is leaving the group.

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Questions 29

How many types of Auto-Discovery routes are defined for MCAST-VPN NLRI?

Options:

A.

3

B.

5

C.

7

D.

9

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Questions 30

Click the exhibit.

Based on the output shown, which of the following is correct?

Options:

A.

The I-PMSI group address is 239.1.1.10.

B.

The S-PMSI group address is 239.1.1.10.

C.

This PE has no receiver.

D.

The system IP address of this PE is 10.10.10.1.

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Questions 31

Refer to the following exhibit.

Assume all links have an equal metric in the IGP. Receiver 2 and Receiver 3 have joined the multicast group and the source is not sending. Where will the Shared Path Tree have been created? (Choose two)

Options:

A.

Router G-E-C

B.

Router F-D-E-G

C.

Router F-D-E-C

D.

Router C-A

E.

Router F-D-B-A

F.

Router G-E-C- A

G.

No Shared Path Tree will have been created

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Questions 32

The first actions of a router after enabling PIM on the interfaces will be:

Options:

A.

BSR elections followed by DR elections

B.

DR elections followed by PIM Hello messages

C.

DR elections followed by BSR elections

D.

BSR elections followed by PIM Hello messages

E.

PIM Hello messages followed by BSR elections

F.

PIM Hello messages followed by DR elections

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Questions 33

What is the OUI field of the MAC address for IPv4 multicast address?

Options:

A.

00-01-5e

B.

00-01-5f

C.

01-00-5e

D.

01-00-5f

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Questions 34

What is the function of the MDT?

Options:

A.

It is how PIM neighbors become aware of each other

B.

It is how receivers signal the source

C.

It is the path to the RP

D.

It is the multicast data forwarding path

E.

It is the path to the DR

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Questions 35

Which of the following configuration steps are mandatory for IPv4 PIM ASM to work? (Choose two)

Options:

A.

Configure PIM on core and source facing interfaces

B.

Configure PIM on access facing interfaces

C.

Configure RP statically or via BSR

D.

Create and apply register and join policies

E.

Define the rpf-table

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Questions 36

Which of the following statements best describes the behavior seen in the network when a receiver joins a multicast channel in the PIM ASM network shown in the exhibit?

Options:

A.

Both Router B and Router C will propagate a PIM (*, G) Join to the RP when a receiver joins

B.

Only Router B will propagate a PIM (*.G) Join to the RP when a receiver joins

C.

Only Router C will propagate a PIM(\G) Join to the RP when a receiver joins

D.

Depends on the next hop for RP in Router D's RPF table

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Questions 37

Which of the following multicast packets can be forwarded on the Internet?

Options:

A.

A multicast packet destined to FF70:: 1234

B.

A multicast packet destined to FF1E:: 1234

C.

A multicast packet destined to FF02:: 1234

D.

A multicast packet destined to FF3A:: 1234

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Status:
Expired
Exam Code: 4A0-108
Exam Name: Nokia Multicast Protocols
Last Update: Mar 14, 2024
Questions: 247
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