The precaution of prohibiting employees from bringing personal computing devices into a facility is what type of security control?

Physical controls are tangible, hardware-based measures such as locks, mantraps, or security guards that physically prevent access - not rules about what employees may carry.

Procedural controls are administrative policies, rules, and guidelines that dictate how people must behave within a facility or organization. Banning personal devices is a written or verbal rule enforced through HR or security policy, making it procedural rather than a physical or technical mechanism.

Technical controls use technology to enforce security, such as network access control (NAC) systems that block unauthorized devices - not a verbal or written prohibition.

Compliance is not a category of security control; it refers to adherence to laws, regulations, or standards rather than describing how a control is implemented.