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War dialing

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Term Definition
War dialing
Process in which a computer is used to automatically call a list of telephone numbers, usually dialing every number in a local area code to search for computers and fax machines that can successfully make a connection with the computer. When each call is made, the program makes a list of which numbers made a successful connection with a computer and a fax machine. That list can be later used by hackers for various reasons, including hacking a wireless access point with an unprotected login or an easily cracked password to gain access to a network.