Web.Config File Explanation

Hi All

I am a new bee in asp.net

can any one tell me the meaning of tags mentioned in web.config file
like <authentication mode="Forms">
<authorization> etc...

if not all, then atleast give me some idea of some tags which are commonly used and really usefull.

many thanx in adv.

Here is a nice Article that explains about the web.config files and the Tags.
http://www.sitepoint.com/article/web...le-demystified

thanx much

lemme have a look at this, i will get back to clear my doubts