Video traffic is being distributed across a large WAN network. The video source originates from different parts of the multicast domain at different times. Which multicast technology provides…

SSM uses (S,G) channel subscriptions to build a Shortest Path Tree directly from each receiver to the specific active source, completely bypassing the RP. When the video source originates from different locations at different times, receivers can join (S,G) states for whichever source is currently active, ensuring the most direct and optimal path is always used. This source-specific tree construction eliminates the suboptimal routing detour through a shared RP that other multicast models introduce.

PIM sparse mode uses a shared RP-based (*,G) tree for source discovery and initial traffic distribution, which routes traffic through the RP rather than directly between source and receiver, resulting in suboptimal paths.

Bidirectional PIM uses a single shared bidirectional tree rooted at the RP for all sources sending to a group, meaning all traffic must traverse the RP regardless of where the source or receiver is located.

Any Source Multicast (ASM) relies on a shared RP-based distribution tree that routes traffic through the RP rather than building direct source-to-receiver paths, making it suboptimal when the source location changes frequently.