the terms window and forms authentication are as below.
==> Windows authentication is the default authentication method of the ASP.NET
application. It uses the security scheme of windows operating system of corporate network.
Windows authentication uses user names, passwords, and permissions of network
resources and Web applications. User lists for
Windows authentication are included in the element of Web.config.
==> Form authentication allows creating own database of users in the application’s
Web.config file or in a separate user database and
validate the identity of the users when they visit Web site. Users do not
have to be member of a domain-based network to have
access to your application