Firstly, I'm not sure how friendly the users of this site are to students but my question seems to be well suited.
I am configuring a domain with multiple Windows Server 2008 machines and am curious whether I can successfully install certain roles on a read-only domain controller. I'm not sure whether the read-only configuration applies only to the Active Directory role or to other roles on that server. I ask because I am unable to make changes to DNS from the read-only machine, which leads me to believe that other roles would also be affected in this way. I do know that the issue with DNS may be because it relies on Active Directory, but still I am unsure.
Thanks to anyone who takes the time to read and answer my question.