Active Fire Protection: Systems that are activated after a fire breaks out, responsible for detection, alarm, and suppression.
Includes: smoke detectors, sprinkler systems, fire hydrants, etc.
Passive Fire Protection: Safety measures that are put in place before a fire occurs, designed to contain and slow the spread of flames and smoke.
Includes: firewalls, fire-rated doors, fire-resistant building materials, and the critically important firestop systems!