I don't see how you need more if you
And it must be a pretty shitty college if they don't even have an IT team and you just can go plain ask how they're infrastructure is.
And not to forget, a company(college in this case) using a router as DMZ is plain silly. Servers are used even in small company's since a router DMZ setup is just too unprofessional.
http://i.imgur.com/dbNBinQ.png