Alcatel-Lucent Multicast Protocols v7.0 (4A0-108)

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Total 247 questions

How does the RP get the first multicast data packet from source?

  • A. Via the Source Path Tree
  • B. Via a Register Message which encapsulates the multicast traffic
  • C. Via a Bootstrap Message which encapsulates the multicast traffic
  • D. Via the Shared Path Tree


Answer : B

Who periodically sends IGMP Host Membership Queries?

  • A. The router elected as Querier on a LAN
  • B. The first host to expire their local suppression timer
  • C. Only the multicast enabled hosts on a LAN
  • D. All routers on a LAN
  • E. All multicast enabled routers on a LAN


Answer : A

Refer to the following exhibit.
Choose the best answer that describes the multicast LAN.

  • A. There are no active sources in the network
  • B. There is one active source for 239.1.1.1 and two active sources for 239.2.2.2
  • C. The devices on sap 1/1/4 and sdp 1000:500 have issued joins for 239.1.1.1
  • D. There is a router on sdp 1000:500


Answer : D

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

  • A. It is willing to receive traffic from all sources
  • B. It is willing to receive traffic from any source
  • C. This is the initial join message and a selection of source will follow
  • D. This is the way it indicates it is leaving the group


Answer : D

What is the position of the router shown in the exhibit?

  • A. The first hop router from the source
  • B. The RP
  • C. One router upstream on the Shared Path Tree from the diverging router
  • D. The last hop router from the source


Answer : A

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. After the switchover of Router F, will a branch of the Shared
Path Tree still exist between Router D and Router E?

  • A. Yes. As it is maintained by the PIM hellos, it will exist until Router D or Router E is PIM disabled
  • B. Yes, it will exist until the source stops sending multicast traffic
  • C. Yes, it will exist until Router D prunes itself from the shared path tree
  • D. No. Only Source Path Trees will remain


Answer : C

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

  • A. (*, G) Join/Prune
  • B. (S, G) Join/Prune
  • C. Register
  • D. Candidate-RP-Advertisement


Answer : C

How often will a router issue IGMP Host Membership Reports for group 224.0.0.2?

  • A. Never
  • B. 30 seconds
  • C. 60 seconds
  • D. 120 seconds
  • E. 260 seconds
  • F. A router will never join this group


Answer : A

Which of the following are mandatory functions of a multicast receiver on a multicast network using IGMP version 2? (Choose two)

  • A. Report their multicast group membership to their local router
  • B. Signal their local router as they join and leave multicast groups
  • C. Generate feedback to the network or source
  • D. Listen for announcements advertising available sessions from the source
  • E. Generate multicast data to the group


Answer : A,B

Select the statements that relate to the Source Path Tree in ASM. (Choose three)

  • A. The RP is the root of the tree
  • B. The multicast source is the root of the tree
  • C. It is represented by (*, G) entries
  • D. It is represented by (S, G) entries
  • E. The path between receiver and source is always the shortest path
  • F. The Source Path Tree cannot be created without the RP
  • G. It is the initial forwarding path created


Answer : B,D,E

If the access network supports IGMP version 2 only, what additional configuration is required to enable the SSM model?

  • A. IGMP snooping
  • B. IGMP compatibility mode support
  • C. IGMP version 2 to IGMP version 3 translations
  • D. IGMP (*, G) Join to PIM (S. G) Join translation
  • E. PIM ASM to PIM SSM translations


Answer : D

Which of the following PIM messages are sent towards RP? (Choose two)

  • A. (*, G) Join/Prune
  • B. (S.G) Join/Prune
  • C. Register Stop
  • D. (S, G, rpt) Join/Prune


Answer : A,D

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?

  • A. PIM(*, G)Join
  • B. IGMP(*, G)Join
  • C. PIM Hello
  • D. PIM (S, G)RP-bit prune
  • E. PIM (*, G)RP-bit prune


Answer : D

Which of the following statements about Mrouter port is false?

  • A. Mrouter port is indicated by (**) entry in the MFIB
  • B. Mrouter port can be configured manually
  • C. A port on which any type of IGMP message is received will be set as an mrouter port
  • D. IGMP reports will only be forwarded out of mrouter ports once igmp-snooping is enabled in the vpls service


Answer : C

Refer to the exhibit.
Who will be the RP for group 239.1.34.92?

  • A. 10.10.10.24 since Dynamic has higher priority than Static
  • B. 10.10.10.66 since 239.0.0.0/8 is more specific than 224.0.0.0/4
  • C. Both since 239.1.34.92 is part of both ranges
  • D. It depends on the setting of the override parameter
  • E. Neither since this presents a conflict


Answer : D

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Total 247 questions