Section: Threats and Vulnerabilities
Explanation/Reference:
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.