The routers get involved in this and they know that on the path between this router and that router a certain percentage of the bandwidth is reserved to these things and a certain percentage of it is...
But as soon as we got that higher speed access to the home there?s going to be a tremendous crunch on the backbones for a much higher speed bandwidth. People really ought to be planning for that.
One of the things that is not so good is that a decision was made long ago about the size of an IP address - 32 bits. At the time it was a number much larger than anyone could imagine ever having that...