Which operating system utilizes Internet Information Services?

Internet Information Services, commonly known as IIS, is a web server software created by Microsoft, which is integrated into Windows operating systems. IIS provides a variety of features that allow users to host websites, serve content, and manage a range of web applications. Its close integration with the Windows environment makes it a preferred choice for integrating web services with other Microsoft products, such as ASP.NET for web development.

The other options do not utilize IIS. Unix and Linux are alternative operating systems that operate quite differently and generally do not support Internet Information Services, as they use different web server software, such as Apache or Nginx. The term "platform-independent" refers to software that can operate on multiple operating systems, but IIS is specifically designed for Windows platforms. Therefore, the association of IIS with Windows makes that the correct answer.