CompTIA Security+ Question C-80

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

Answer: A

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.