Distributed denial of service

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While similar to a denial of service (DoS) attack, a distributed denial of service (DDoS) attack is coordinated to originate from multiple (tens to thousands) of sources in an attempt to increase the effectiveness of the attack and/or hide the ultimate source. Often a perpetrator compromises multiple machines (zombies or slave devices) and instructs the zombies to launch the attack, so it is difficult to ascertain the ultimate source. Examples include attacks on CNN and Yahoo in the year 2000 and SQL Slammer in 2003.

See also threat


<mp3>http://podcast.hill-vt.com/podsnacks/2007q2/dos.mp3%7Cdownload</mp3> | Denial of Service