@mray Depends on your point of view. Streaming a ballgame to millions of viewers is a problem television solved over 70 years ago. We call that broadcast.

If we use SSM (Single Source Multicast) to unidirectionally stream a game to millions of viewers, I call that broadcast, regardless of how many protocols we use that happen to have #multicast in their name.

Most IP multicast is actually broadcast.

Multicast is group communication. If only one member of the group can speak, that's broadcast.