300-420 · Question #6
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…
The correct answer is B. PIM-SSM. PIM Source-Specific Multicast (PIM-SSM) enables receivers to subscribe to a specific (source, group) pair using the notation (S, G). It uses the reserved address range 232.0.0.0/8 and completely eliminates the need for a Rendezvous Point (RP) because the source address is known…
Question
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?
Options
- APIM-SM
- BPIM-SSM
- Cany-source multicast
- DBIDIR-PIM
How the community answered
(49 responses)- A2% (1)
- B92% (45)
- C2% (1)
- D4% (2)
Explanation
PIM Source-Specific Multicast (PIM-SSM) enables receivers to subscribe to a specific (source, group) pair using the notation (S, G). It uses the reserved address range 232.0.0.0/8 and completely eliminates the need for a Rendezvous Point (RP) because the source address is known by the receiver at join time. This makes it ideal for cable TV providers with many distinct video streams (channels), where each stream has a known, fixed source. PIM-SM (A) and BIDIR-PIM (D) both require an RP. Any-source multicast (C) is a general term for traditional PIM-SM behavior where any source can send to a group - it still relies on an RP.
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