Yeah, so your SFU or your TURN server needs to support TCP.
But if you're on public wifi, chances are you can't get inbound tcp to work. And the majority of the peers you might connect to probably can't either. It's not worth the effort to eek a tiny % more peer to peer when you have to build the relay server fallback anyway.
But if you're on public wifi, chances are you can't get inbound tcp to work. And the majority of the peers you might connect to probably can't either. It's not worth the effort to eek a tiny % more peer to peer when you have to build the relay server fallback anyway.