What are IIS five types of authentication methods?

IIS (internet Information Services) supports five main types of authentication methods: Anonymous Authentication, which allows users to access resources without credentials; Basic Authentication, where credentials are sent in plain text; Digest Authentication, which encrypts credentials for added security; Windows Authentication, that uses NTLM or Kerberos protocols for secure user verification in a Windows environment; and Forms Authentication, which allows for custom user login forms and can be integrated with ASP.NET applications. Each method serves different security needs and deployment scenariOS.