Your company has a class C address allocation of 211.0 and you are about to add your 250 th device to your network.

Your company has a class C address allocation of 211.255.50.0 and you are about to add your 250th device to your network.  You expect to need at least another 20 IP addresses in the next few months and are unable to obtain any more address space from your ISP.  What networking addressing and services will you need to use to make it possible to allow all your users to be able to connect to the Internet in the future?