application layer multicast
from stuff the internet says on scalability …
This is our implementation of Bimodal Multicast over webRTC, which we use to broadcast information in our peer-to-peer networks. The Gossip Protocol allows for a message to be broadcasted from one peer to the rest of the peers that it is connected to, after which those peers start to gossip. This makes it possible for one peer to broadcast a message that will be spread as far as the network reaches from this user, and without any ACKs we can be confident that every user has got the message.
interesting implications for media delivery if someone is to actually use it.