On Mar 14, 2014 5:38 PM, "Dave Crocker" <dcrocker(_at_)bbiw(_dot_)net> wrote:
Better still is that among its various contributions to Internet growth
was that it provided a second, recognized backbone, forcing the development
of BGP, which permits multiple independent backbones. As such it moved
away from a monopolistic backbone model.
Well, first it led to non-hierarchical routing, when we introduced
potential loops (and HP disappeared from the ARPAnet briefly, until we
realized what we had done). BGP was needed later when the AS-level topology
became even more complex.