Which of the following tools hides information about IIS Webservers so that they can be prevented from various attacks performed by an attacker?

WinSSLMiM is an SSL man-in-the-middle interception tool used to capture encrypted traffic - it does not hide or alter web server identity headers.

httprint is used to fingerprint and identify web server information, which is the opposite function of hiding server identity.

ServerMask works by stripping or replacing the HTTP Server response header and other IIS-specific headers that reveal the web server type and version to potential attackers. By preventing fingerprinting tools from accurately identifying the server platform, ServerMask removes the attacker's ability to look up known vulnerabilities specific to that IIS version. This security-through-obscurity layer is a recognized IIS hardening technique used alongside patching and access controls.

Whisker is a CGI scanner that searches for vulnerable scripts on web servers and does not provide any capability for masking server identity.