What is RPM and for that matter what is YUM?
I've been a harden Micosoft user for years, since pre-Windows 3.11 days starting with DOS and going up from there.
In the past when I was working for a firm that built web delivered training solutions using Delphi, .NET, HTML, and CGI with full user tracking and so on, I built Windows web server boxes starting with NT4. We learnt the hard way about security pre-Service Pack 4 when the box got hacked and used as a torrent server for a day. Cost allot in bandwidth

and wasn't my fault as someone else in the office had done the OS install. After the event I had to do the security lock down on it, which did the trick.
I'm now a freelancer and have been back to work for them since then. They use Dell Servers now but are still running Windows Server 2003.
Personaly I feel that Linux is a much better and more secure platform for web hosting enviroment. That's why my own servers will be Linux.
I would put myself in the Linux newbiee box even though I have played with Redhat before, and built a few Level 3 servers in the past.
Matt