You should never connect classified and unclassified systems together.

• A. True
• B. False
• C. Not applicable
• D. Not sure

Answer: (A)

Separating classified and unclassified networks is a fundamental protection mechanism. When sensitive information lives on classified systems, keeping them isolated from unclassified networks helps ensure that threats on the unclassified side—malware, phishing, insider actions, or misconfigurations—cannot reach or contaminate the classified environment. This boundary preserves confidentiality, integrity, and control over who can access sensitive data, and it aligns with need-to-know and compartmentalization requirements. In practice, controlled data transfers between domains do occur only through formally approved cross-domain solutions that undergo rigorous authorization; but the default, safest stance is to avoid direct connections to maintain strict boundary protections. So the statement is correct.