Answer / swapna

Role Based Security lets you identify groups of users to
allow or deny based on their role in the organization.In
Windows NT and Windows XP, roles map to names used to
identify user groups.

Windows defines several built-in groups, including
Administrators, Users, and Guests.To allow or deny access
to certain groups of users, add the <ROLES>element to the
authorization list in your Web application's Web.config
file.e.g.

<AUTHORIZATION>< authorization >
< allow roles="Domain Name\Administrators" / > < !--
Allow Administrators in domain. -- >
< deny users="*" / > < !--
Deny anyone else. -- >
< /authorization >

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