Putting up signs serves as what type of control measure?

Putting up signs primarily serves as a deterrent control measure. The purpose of a deterrent is to discourage unwanted behavior by making potential violators aware that their actions are being monitored and that there are consequences for them. For example, signs that indicate surveillance cameras are present or that trespassing is prohibited can dissuade individuals from engaging in those behaviors.

Deterrent controls are commonly used in both physical security and information security contexts. They help create an environment where individuals think twice before attempting to breach security protocols, as the visibility of such signs suggests a commitment to enforcing rules and regulations.

Other control measures listed serve different purposes. While preventive controls aim to stop unwanted actions before they occur, detective controls focus on identifying incidents after they happen. Corrective measures are employed to rectify a situation once an issue has been detected. Signs are not designed to prevent actions outright or correct them after the fact but rather to dissuade individuals from acting improperly in the first place.