What type of user interface is provided by a second, less-privileged PVWA server?

The correct answer is that the second, less-privileged PVWA (Privileged Vault Web Access) server provides a web interface for external users. This setup is designed to enhance security by segregating internal staff from external users, thus ensuring that privileged access and sensitive operations are kept separate from less secure environments.

Having a dedicated web interface for external users allows organizations to provide access to necessary functionalities without exposing their internal systems to potential vulnerabilities. This layer of separation is especially important for managing privileged accounts and ensuring the security of sensitive information.

The other options do not specifically address the role of the second PVWA server in enhancing security through user interface segregation. Internal staff interfaces, while relevant, pertain more to the primary operations of privileged staff rather than an external-facilitated security stance. An enhanced security interface could be misleading as it does not specify the context of external access. Lastly, a mobile user interface may offer convenience but does not reflect the specific function of the second, less-privileged PVWA server in regards to external user access.