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Exam 350-401 topic 1 question 554 discussion

Actual exam question from Cisco's 350-401
Question #: 554
Topic #: 1
[All 350-401 Questions]

How does Protocol Independent Multicast function?

  • A. In sparse mode, it establishes neighbor adjacencies and sends hello messages at 5-second intervals.
  • B. It uses the multicast routing table to perform the multicast forwarding function.
  • C. It uses unicast routing information to perform the multicast forwarding function.
  • D. It uses broadcast routing information to perform the multicast forwarding function.
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Suggested Answer: C 🗳️

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rafaelinho88
Highly Voted 1 year, 4 months ago
Selected Answer: C
Although PIM is called a multicast routing protocol, it actually uses the unicast routing table to perform the reverse path forwarding (RPF) check function instead of building up a completely independent multicast routing table. Unlike other routing protocols, PIM does not send and receive routing updates between routers
upvoted 7 times
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[Removed]
Most Recent 6 days, 18 hours ago
Selected Answer: C
C is correct
upvoted 1 times
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[Removed]
2 weeks, 3 days ago
C is correct
upvoted 1 times
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HarwinderSekhon
12 months ago
If you know RPF failure topic, then you know it uses Unicast.
upvoted 2 times
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bendarkel
1 year, 6 months ago
Selected Answer: C
Given answer is correct. PIM relies on IGP for forward.
upvoted 3 times
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iEpsilon
1 year, 8 months ago
Provided answer is correct https://en.wikipedia.org/wiki/Protocol_Independent_Multicast#:~:text=PIM%20is%20not%20dependent%20on%20a%20specific%20unicast%20routing%20protocol%3B%20it%20can%20make%20use%20of%20any%20unicast%20routing%20protocol%20in%20use%20on%20the%20network.%20PIM%20does%20not%20build%20its%20own%20routing%20tables.%20PIM%20uses%20the%20unicast%20routing%20table%20for%20reverse%2Dpath%20forwarding.
upvoted 3 times
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