A(n) ________ database is an extra copy of a database that you keep just in case something happens to the original one

One difference between the basic 911 system and the enhanced system is that

a. the enhanced system identifies the number and location from which the call is being made. b. the enhanced system has a forced disconnect feature. c. the basic system can automatically route calls. d. the basic system does not have the ring-back feature.

Attackers use information collected through ________ to identify vulnerabilities or weak points in system security.

A. enumeration B. networking C. footprinting D. forensics