Which of the following methods can be used for IIS authentication?

The use of PKI (Public Key Infrastructure) for IIS authentication is grounded in its ability to provide a secure and scalable method for verifying the identity of users and devices. PKI utilizes digital certificates as a means of authentication, allowing clients to establish secure connections to the server.

In the context of IIS, it can implement SSL/TLS protocols that ensure data encryption and validation, fostering a trust relationship between users and the web application. This method is particularly advantageous when it comes to enabling secure transactions and protecting sensitive information, as it relies on cryptographic techniques.

While options like LDAP, RSA, and RADIUS represent valid authentication methods used in different contexts, they do not encompass the same overarching infrastructure and capabilities provided by PKI within IIS environments. LDAP is typically associated with directory services, RSA is a cryptographic algorithm rather than a standalone authentication method, and RADIUS is commonly used for remote access and network authentication but does not directly relate to IIS authentication itself.