On a more serious note, this site might give you a general idea. The internet is consisted of what is known as a mesh network. As you probably know, this means that if one route is destroyed, another can take its place seamlessly.
EvelKub Kitty is crazy Premium join:2002-03-17 Phoenix, AZ
Well... it will take the place seamlessly as long as your ISP has backup routes. There are many (especially smaller ones) that have only 1 upstream provider.