Originally Posted by Udgnim
if those IP addresses don't have subnet masks associated with them, I'd assume classful addressing and just use /8 /16 /24 subnet masks
determining private IP addresses shouldn't be hard
His directions indicate to determine the default subnet for the addresses, which if you can figure out which class of address it is, each one has a default subnet with it. I'm surprised their still teaching classful network design. I've been doing Classles for a few years now. I guess it's still relevant to atleast know the basics though.