denial of service (DOS) attack
Definition
Cracker or hacker attack on a computer system or website, aimed at disrupting its normal functions. A common method used in DOS attacks is to deluge the system or site with a flood of messages that drastically slow down its response time, or overwhelm its data handling capacity resulting in a system crash. In many countries a DOS attack is a criminal offense even if attempted as a prank. See also active attack and passive attack.
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