> propagates, are you implying push or pull? It doesn't imply either. I've always used the term "propagate" even though I understand it to be a pull system due

> propagates, are you implying push or pull? It doesn't imply either. I've always used the term "propagate" even though I understand it to be a pull system due to the existence of the TTL. Either way I hold no association between pull/push and "propagate" in my mind either. Maybe the author and their friend have some bias towards this definition, perhaps due to technical contexts they have most used that word within.