What is the characteristic of bidirectional PIM?

The correct answer is A. Explicitly builds shared bidirectional trees. The defining characteristic of Bidirectional PIM (BIDIR-PIM) is that it explicitly builds shared bidirectional trees rooted at the Rendezvous Point (RP). Unlike PIM-SM, which builds unidirectional shared trees and can switch to source-specific trees (SPT), BIDIR-PIM uses only…

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AExplicitly builds shared bidirectional trees.

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The defining characteristic of Bidirectional PIM (BIDIR-PIM) is that it explicitly builds shared bidirectional trees rooted at the Rendezvous Point (RP). Unlike PIM-SM, which builds unidirectional shared trees and can switch to source-specific trees (SPT), BIDIR-PIM uses only the shared RP tree but allows traffic to flow in both directions - from sources up toward the RP and from the RP down toward receivers. This eliminates source registration and SPT switchover, making BIDIR-PIM highly scalable for many-to-many multicast applications.

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#PIM Bidirectional#shared tree#multicast#RP

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