Defensive Counterair (DCA) is defined as "all the defensive measures designed to detect, identify, intercept, and destroy or negate enemy forces attempting to penetrate or attack through friendly airspace" (JP 1-02). A major goal of DCA operations, in concert with OCA operations, is to provide an area from which forces can operate, secure from air and missile threats. The DCA mission comprises both active and passive defense measures. Active defense is "the employment of limited offensive action and counterattacks to deny a contested area or position to the enemy" (JP 1-02). It includes both ballistic missile defense and air breathing threat defense, and encompasses point defense, area defense, and high value airborne asset defense. Passive defense is "measures taken to reduce the probability of and to minimize the effects of damage caused by hostile action without the intention of taking the initiative" (JP 1-02). It includes detection and warning; chemical, biological, radiological, and nuclear defense; camouflage, concealment, and deception; hardening; reconstitution; dispersion; redundancy; and mobility, counter-measures, and stealth. COUNT 5
QSN1 What does the abbreviation DCA stand for?  ANS1 Defensive Counterair QSN2 What sort of airspace is the DCA designed to protect? ANS2 friendly QSN3 What is active defense, according to the functions of the DCA?  ANS3 employment of limited offensive action and counterattacks QSN4 What kind of missile defense does active defense protect against, according to the DCA? ANS4 ballistic QSN5 What is one of the many ways the DCA utilizes passive defense to protect from enemy attacks?  ANS5 counter-measures