I would like to learn Linux with clear concepts but at the same time my background is not that strong. Thanks to all :)

But what explanation ?

Your question was too vague to make sense of :(

So we can't help without a specific question.

@jimmy:

i didn't get the explaination for named.conf file in those pages posted by Trinity... and that was wer i got stuck and stopped..... :/

I think that you're probably going to have to offer much more information if that isn't what you're after.

You could edit your question to make it much clearer.

@trinity:

thanks for the reply....

but the explaination is not that basic....

its a nice document,but i am new to linux world...please help

Have a look at this:

http://www.howtoforge.com/traditional_dns_howto

@Bogofilter

i meant the files which we edit after installation of nameserver and bind packages....as i have mentioned that i know how to configure DNS and DHCP in a mechanical way but i want to learn the logic of editting those files and the format in which those files have been set up/build

If you would like to list a few of the files then people will probably help explain what function they have.