On Fri, Mar 20, 2015 at 1:34 PM, Jay Pipes <jaypipes at gmail.com> wrote: > How is 0.0.0.1 a host address? That isn't a valid IP address, AFAIK. It isn't a valid *IP* address without the network part. However, it can be referred to as the "host address on the network" or the host part of the IP address. Carl