I want to know the answer to the following question:
What sort of airspace is the DCA designed to protect?
All the background I'm provided with is that "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).". Is that enough to answer the question?
Answer: yes