CompTIA Security+ Exam Prep

Answer: C - When an individual gains unauthorized access by following another person to appear as their guest, it is referred to as piggybacking. This is a common problem with controlling authorized access into a facility or area. This occurs when an individual gains unauthorized access by using someone else’s legitimate credentials or access rights. This is most often done by an individual following another person closely through a door without providing credentials. The best preventive measures against piggyback are user-activated readers so that the user must do some activity to gain entry.