Which of the following types of authentication is generally used for public Internet Web sites?

Anonymous authentication grants access to web resources without requiring a username or password, which is the appropriate and expected behavior for public Internet websites where content must be freely accessible to any visitor without an account.

Integrated Windows Authentication uses Kerberos or NTLM and requires users to have a valid Windows domain account, making it suitable only for internal intranet sites, not public Internet sites.

Basic authentication transmits credentials in Base64 encoding and requires a valid username and password, which is not appropriate for public sites where no credential barrier should exist.

Digest authentication requires a valid user account and uses a challenge-response mechanism over HTTP, which is designed for authenticated access rather than open public access.