|at my place, I was running an ICS network using phoneline adapter cards. 2 laptops were added to the system and were networked together, one using ICS to act as router for the other not attached to the home network. I did not set up this network so don't know what IP addresses were used but something other than 192.168.0.x must have been used. all computers were able to access the internet with this arrangement. |
now I have replaced all of this with a wireless router and all computers connect to the internet through the router so the secondary network is not used anymore.
so to answer your question, yes, two ip ranges can be used and all pcs in both ranges should be able to access the internet.