CREST Practitioner Security Analyst (CPSA) 2025 – 400 Free Practice Questions to Pass the Exam

The correct choice is Windows Vista, which is classified under NT 6.0. Understanding the classification of Windows operating systems involves recognizing how Microsoft groups its versions by their underlying architecture and kernel changes.

Windows Vista marked a significant advancement in Microsoft's operating system line, implementing a new kernel version that distinguishes it from earlier versions. Comparatively, Windows XP, which is based on the NT 5.1 classification, and Windows 8, which is NT 6.2, do not belong to this classification. Windows Home Server is also categorized differently, as it was designed for home networks rather than general computing use.

Recognizing Windows Vista as NT 6.0 is essential for comprehending the evolution of Windows operating systems and their features, as it introduced enhancements in security, user interface, and overall performance that set the foundation for future releases.