Mike, a security professional, is tasked with actively verifying the strength of the security controls
on a company’s live modem pool. Which of the following activities is MOST appropriate?

A.
War dialing

B.
War chalking

C.
War driving

D.
Bluesnarfing

Explanation:
War dialing is a technique of using a modem to automatically scan a list of telephone numbers,
usually dialing every number in a local area code to search for computers, Bulletin board systems
and fax machines. Hackers use the resulting lists for various purposes: hobbyists for exploration,
and crackers – malicious hackers who specialize in computer security – for guessing user accounts
(by capturing voicemail greetings), or locating modems that might provide an entry-point into
computer or other electronic systems. It may also be used by security personnel, for example, to
detect unauthorized devices, such as modems or faxes, on a company’s telephone network.