But still, with my experience at stackoverflow, people here at Serverfault seem to be too harsh haha, I got a downvote on this meta question too, although the support team of Serverfault said I can ask this question on meta.

Right now I say no it doesn't matter. In matter of fact, the one who answered my question was too kind that he pointed me in the right direction of how to think about dealing with servers, I guess he noticed that I'm a pure beginner at these stuff and he kindly assisted me with it.

Thank you. I explained to Reaces in his answer my case. And see, I got a downvote even for asking why would someone get a downvote ;). Thanks for your clarification.

Well, you convinced me. Although I didn't know that I can't post beginner questions on this site, I though it's like stackoverflow, u can ask anything as long as it's clear. I'm not and IT administrator at all actually, I'm helping out a startup company with server issues, so I'm relying on my researches to begin. But in the last few days I knew a lot about AD DS and windows server that now this question's seems too obvious to me.