SECTION REVIEW 5.1 " Check Your Understanding of 1. What threat is realized when an unauthorized person walks into a building behind authorized individuals? 2. A customer enters a bank foyer and is greeted by another set of doors. Employees "buzz" the doors open for customer access. What barrier did the bank install with this setup? 3. A firm is constructing a new building and would like to establish permanent barriers to control vehicle access. What should be used? 4. A gated entrance to a parking lot helps with which security goal? 5. What are the electrical signals that emanate from a printer called