what is purpose of login-config tag web.xml file?

Hi..

some days back i have seen <login-config> tag in web.xml file can you give me what is the purpose of that
of this tag in web.xml with some example??

thanks,
Ramakrishna Rayudu.

Most of the questions you are asking are answered by the Servlet Specification. I suggest reading through it.

yes..i have gone throught that but the thing is didnt get where to use this <login-config>??
normally we will use the Login Page to save our Secure resources in web pages.
but why it came here to web.xml file??