Joe, a security administrator, is concerned with users tailgating into the restricted areas. Given a limited
budget, which of the following would BEST assist Joe with detecting this activity?

A.
Place a full-time guard at the entrance to confirm user identity.

B.
Install a camera and DVR at the entrance to monitor access.

C.
Revoke all proximity badge access to make users justify access.

D.
Install a motion detector near the entrance.

Explanation:
Tailgating is a favorite method of gaining entry to electronically locked systems by following someone
through the door they just unlocked. With a limited budget installing a camera and DVR at the entrance
to monitor access to the restricted areas is the most feasible solution. The benefit of a camera (also
known as closed-circuit television, or CCTV) is that it is always running and can record everything it sees,
creating evidence that can be admissible in court if necessary.Incorrect Answers:
A: A full-time guard at the entrance of the restricted areas will also work, but would be more costly and
guards can also be impersonated. Guards are also more costly in the sense that, guards in combination
with security cameras will be more effective which means that you still need both.
C: Revoking proximity badges will just give free access to all if no other measures are in place.
D: A motion detector will inevitable be triggered even when legitimate users enter the restricted area.

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis,
2014, pp. 357, 367, 372