What is an example of a physical security measure?

A.
A code of conduct that requires staff to adhere to the clear desk policy, ensuring that confidential information is not left visibly on the desk at the end of the work day

B.
An access control policy with passes that have to be worn visibly

C.
The encryption of confidential information

D.
Special fire extinguishers with inert gas, such as Argon

Explanation:
Physical security includes the protection of equipment through climate control (air conditioning, air humidity), the use of special fire extinguishers and the provision of clean energy. Clean energy refers to the prevention of peaks and troughs (dirty energy) in the power supply and the fact that the power supply is filtered.