What are the types of Authentication?

There are three types of Authentication:

1. Windows Authentication: uses the security features integrated into the Windows NT and Windows XP operating system to authenticate and authorize web application users
2. Forms Authentication: allows you to create your own list/database of users and validate the identity of those users when they visit your web site
3. Passport Authentication: uses the Microsoft centralized authentication provider to identify users. Passport provides a way to for users to use a single identity across multiple web applications. To use Passport Authentication in your Web application, you must install the Passport SDK