| TL;DR The only problem is that ISPs love to oversell their capacities. And important services don't need that much bandwidth. NN has nothing to do with this. The "911 calls should not be interrupted by torrents" is such a load of crap argument. It has nothing to do with net neutrality but is all about service level agreements. With landlines, the main problem here is not that your neighbour could prevent you from making a 911 call by torrenting, but that his torrenting affects your bandwidth at all. When you buy 10mbit from your ISP, you should _always_ be provided with that speed, and the ISP should take measures to ensure that.
Not on a per service level, but on a per customer basis. But instead ISPs like to sell "up to 25mbit" offers which actually means "0mbit guaranteed, the rest is lottery" because you share that "25mbit" connection with everybody on the street. Mobile contracts are a bit trickier, because there the topology is unknown and can change anytime, but even here we can calculate a lower bound if we take into account that each lte cell can only support a few hundred [(maybe a few thousand, if you have really fancy tech and own a very wide frequency spectrum)](https://www.linkedin.com/groups/Plz-anyone-help-me-How-11807...) connections at the same time. Even if we assumed that an lte cell can have an utopian 10.000 _active_ users using every available frequency, we would still be left with 300mbit/10.000=30kbit per user, [which is still enough for that goddamn 911 call.](http://www.erlang.com/bandwidth.html) |