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Exam 350-501 topic 1 question 180 discussion

Actual exam question from Cisco's 350-501
Question #: 180
Topic #: 1
[All 350-501 Questions]

A network operator needs to implement PIM-SSM multicast configuration on a customer's network so that users in different domains are able to access and stream live traffic. Which two actions must the engineer perform on the network to make the streaming work? (Choose two.)

  • A. Enable IGMP version 3 at the interface level.
  • B. Enable PIM dense mode on the device.
  • C. Enable PIM sparse mode on the device.
  • D. Enable IGMP version 2 at the interface level.
  • E. Configure at least one MSDP peer on the network.
Show Suggested Answer Hide Answer
Suggested Answer: AC 🗳️
by jacaWAH at Dec. 12, 2021, 9:48 p.m.

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Highly Voted 3 years ago
Selected Answer: AC
A and C are the correct answers. SSM is suitable for use when there are well-known sources either within the local PIM domain or within another PIM domain. The MSDP, which is needed for interdomain multicast routing when regular PIM-SM is used within a domain, is no longer needed for SSM. ^ This is as per Cisco
upvoted 8 times
chst
2 years, 5 months ago
it's correct AC https://www.cisco.com/c/en/us/td/docs/ios/solutions_docs/ip_multicast/Phase_2/mcst_p2.html#wp1186721
upvoted 1 times
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Abbribas
Most Recent 9 months ago
Selected Answer: AC
A. Enable IGMP version 3 at the interface level. IGMPv3 is required for PIM-SSM because it supports source-specific multicast, allowing receivers to specify the exact source from which they want to receive multicast traffic. C. Enable PIM sparse mode on the device. PIM-SSM operates in sparse mode. Sparse mode is necessary for controlling multicast traffic efficiently in a network where receivers explicitly request streams from specific sources.
upvoted 1 times
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TonBud
10 months, 3 weeks ago
Selected Answer: AC
igmp v3 and pim ...
upvoted 1 times
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Worgen44
1 year, 11 months ago
Selected Answer: AC
The correct answers for the question are: A. Enable IGMP version 3 at the interface level. C. Enable PIM sparse mode on the device. MSDP is not needed in PIM-SSM
upvoted 1 times
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xChdjdufurpew
1 year, 11 months ago
there is no need to manage MSDP for SSM between PIM domains
upvoted 1 times
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Samarjit1983
2 years, 3 months ago
An SSM-configured network has distinct advantages over a traditionally configured PIM sparse-mode network. There is no need for shared trees or RP mapping (no RP is required), or for RP-to-RP source discovery through MSDP. https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/concept/multicast-pim-ssm.html
upvoted 1 times
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chst
2 years, 11 months ago
A and D are correct The SSM network scenario used in this document is based on the hypothetical interdomain ISP network scenario described in the "Interdomain Multicast Solutions Using MSDP" document. Figure 1 https://www.cisco.com/c/en/us/td/docs/ios/solutions_docs/ip_multicast/Phase_2/mcst_p2.html
upvoted 1 times
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ijangulashvili
3 years ago
Selected Answer: AC
In SSM we dont need RP, MSDP and so on anymore, just Sparse mode and igmpv3 https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/concept/multicast-pim-ssm.html
upvoted 2 times
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jacaWAH
3 years, 5 months ago
not AC?
upvoted 2 times
EdgardoAC
3 years, 4 months ago
Enabling PIM-Sparse mode is required to use SSM, however the question also states that the users are in different domains, so MSDP is used to connect multiple PIM-SSM domains.
upvoted 1 times
ijangulashvili
3 years ago
but why do we need MSDP is SSM? there are no RP, RP mappings and so on. I think AC is the correct answer
upvoted 1 times
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C (25%)
B (20%)
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