Which term refers to the employment of devices or techniques that impair the operational effectiveness of enemy activity, with countermeasures that negate vulnerabilities?

• A. Countermeasure
• B. Counterintelligence (CI)
• C. Corporate Family
• D. CISA

Answer: (A)

Countermeasures are actions, devices, or techniques designed to reduce an adversary’s ability to operate and to offset vulnerabilities in your own defenses. The scenario described—using tools or methods that impair enemy activity while deploying defenses that negate weaknesses—is exactly what a countermeasure is meant to accomplish. It centers on actively degrading the opponent’s effectiveness and closing gaps that could be exploited, rather than on information gathering or unrelated concepts. The other options don’t fit because they pertain to different ideas: counterintelligence focuses on protecting information and detecting espionage, while corporate family and CISA refer to unrelated terms or certifications.