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Alcatel-Lucent 4A0-108 Exam
4A0-108 Multicast Protocols (Page 9 )

Updated On: 12-Feb-2026
Page 9 of 51
PDF with 247 Questions

Refer to the following exhibit.



Assuming all links have an equal metric in the IGP, where will the Shared Path Tree be built when Receiver 3 joins the multicast group?

  1. Router G-E-C
  2. Router G-E-C-A
  3. Router G-E-D-B-A
  4. There is insufficient information to answer

Answer(s): A



Refer to the following exhibit.



Assuming all links have an equal metric in the IGP, where will Source Path Tree have been created if Receiver 2 and Receiver 3 have joined the multicast group and the source is sending and the switchover has occurred? (Choose two)

  1. Router F-D-B-A
  2. Router G-E-C-A
  3. Router C-E-D-B-A
  4. Router G-E-C
  5. Router F-D-E-C

Answer(s): A,B



What is the function of the MDT?

  1. It is how PIM neighbors become aware of each other
  2. It is how receivers signal the source
  3. It is the path to the RP
  4. It is the multicast data forwarding path
  5. It is the path to the DR

Answer(s): D



What impact will an asymmetric IGP routing topology have on the PIM RPF check?

  1. The PIM RPF check may fail since traffic from the source may arrive on one interface while the IP route to the source may point to another interface on the PIM router
  2. PIM does not work in an asymmetric topology and therefore the RPF check will not be done
  3. There will be no impact since the shared and source path trees are built from the receiver to the source
  4. There is not enough information provided to answer the question

Answer(s): C



How many multicast groups may a single receiver join at any one time?

  1. 1
  2. 2
  3. 4
  4. 256
  5. As many as the operating system and software allow

Answer(s): E






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