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Exam 300-420 topic 1 question 129 discussion

Actual exam question from Cisco's 300-420
Question #: 129
Topic #: 1
[All 300-420 Questions]

An engineer is working for a large cable TV provider that requires multiple sources streaming video on different channels using multicast with no rendezvous point.
Which multicast protocol meets these requirements?

  • A. PIM-SM
  • B. PIM-SSM
  • C. any-source multicast
  • D. BIDIR-PIM
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️

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kudasay
Highly Voted 3 years, 5 months ago
PIM-SSM is correct
upvoted 13 times
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luisjuradoledesma
Highly Voted 3 years, 3 months ago
B - PIM-SSM is suitable for when well-known sources exist within the local PIM domain and for broadcast applications. Also, PIM-SSM eliminates the RPs and shared trees - then it could be correct.
upvoted 5 times
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nicolamazzoletti
Most Recent 7 months, 3 weeks ago
Selected Answer: B
With BIR-PIM all the traffic passes via the RP
upvoted 1 times
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Lungful
8 months, 3 weeks ago
Selected Answer: B
B is correct.
upvoted 1 times
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vangio
9 months, 2 weeks ago
Correct B
upvoted 1 times
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Dyks
1 year ago
Selected Answer: B
PIM-SSM utilizes the source tree and not the shared tree so there is no need for an RP. BIR-PIM uses shared tree only (RP Required) PIM-SM use both Source and Shared Tree (RP Required)
upvoted 3 times
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Eards
1 year, 6 months ago
Selected Answer: B
PIM-SSM
upvoted 1 times
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namibdigger
1 year, 9 months ago
Selected Answer: B
Agree with PIM-SSM: is the best one-to-many (=broadcast = TV) model which eliminates RP
upvoted 1 times
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roganjosh
2 years, 2 months ago
Selected Answer: B
PIM-SSM is correct , no RP or shared (*,G) tree, only SPT (S,G) to the sender.
upvoted 2 times
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Xavi07
2 years, 10 months ago
SSM is the correct. SSM eliminates the RP. In Bidir there is RP
upvoted 3 times
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luisjuradoledesma
3 years, 3 months ago
In addition - please, note, the RP is required for BIDIR PIM - refer to: In bidirectional mode, traffic is routed only along a bidirectional shared tree that is rooted at the rendezvous point (RP) for the group https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9600/software/release/16-12/configuration_guide/ip_mcast_rtng/b_1612_ip_mcast_rtng_9600_cg/configuring_pim.html#id_111801
upvoted 3 times
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Blipblop
3 years, 3 months ago
I think BIDIR-PIM is correct because it’s used for when we have many sources and receivers talking to each other.
upvoted 1 times
ejohnson7
2 years, 3 months ago
sorry my friend you are wrong the ans is SSM no RP
upvoted 4 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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