thx for the immediate reply..
yes, i wanted to setup 2 dns servers on my home network to facilitate my web server.. right now im just doing some google search because i really dont have idea howto deal with the setup and configuration needed to run my own dns servers.
my question is, my webserver is running on Linux CentOS, do i need to setup another 2 pc's running same operating system (centos) to configure as my dns servers? coz i have read about DNS and BIND setting dns servers for Master/Slave setup. does it also need to have a web server installed on both?
i was just thinking that DNS server is for the purpose if my web server is down then the other may act as my secondary. please explain how it work

. sorry for all my dumb questions

.. but i want to learn from people i can say qualified to this field.