642-885 Exam Dumps | Which multicast routing protocol is most optimal for supporting many-to-many multicast applications?

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Cisco.642-885.v2018-06-04.q123
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Question 5/123

Which multicast routing protocol is most optimal for supporting many-to-many multicast applications?

A. PIM-SM

B. PIM-BIDIR

C. MP-BGP

D. DVMRP

E. MSDP

Correct Answer: B

Explanation/Reference:
Explanation:
PIM-Bidirectional Operations
PIM Bidirectional (BIDIR) has one shared tree from sources to RP and from RP to receivers. This is unlike the PIM-SM, which is unidirectional by nature with multiple source trees - one per (S, G) or a shared tree from receiver to RP and multiple SG trees from RP to sources.
Benefits of PIM BIDIR are as follows:
* As many sources for the same group use one and only state (*, G), only minimal states are required in each router.
* No data triggered events.
* Rendezvous Point (RP) router not required. The RP address only needs to be a routable address and need not exist on a physical device.

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