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Exam 4A0-108 topic 1 question 4 discussion

Actual exam question from Alcatel-Lucent's 4A0-108
Question #: 4
Topic #: 1
[All 4A0-108 Questions]

An Alcatel-Lucent 7750 SR is unable to locate a multicast source address in the multicast forwarding table. However, the source address is available in the unicast forwarding table.
Which statement best describes the default RPF check behavior of the 7750 SR?

  • A. The RPF check will fail as PIM relies exclusively on the multicast forwarding table by default
  • B. The RPF check will not fail, as by default PIM uses the multicast forwarding table first for RPF check, if not found in the multicast forwarding table then refers to unicast forwarding table
  • C. The RPF check will not fail as PIM uses only the unicast forwarding table by default
  • D. The RPF check will fail as the RPF check requires that the source address be present in both the unicast and multicast forwarding table
  • E. Not enough information is provided to answer the question
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Suggested Answer: C 🗳️
by vynyfulu at April 5, 2025, 8:50 a.m.

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