CompTIA A+ Core 2 (220-1202), Domain 1, Objective 1.3 focuses on the "N" and "KN" editions of Windows: special versions that ship without certain built-in media technologies, the Media Feature Pack that restores what they are missing, the regulatory reason these editions exist, and the situations in which a technician will actually encounter them. It is a narrow topic, but it appears on the exam and it explains a genuinely confusing support scenario.
In this article you'll learn what Windows N and KN editions are, exactly what they leave out, how the Media Feature Pack fixes the resulting problems, why these editions exist for regulatory reasons, and when a help-desk technician is likely to run into one.