"The attack that blacked out Google, Yahoo and other major Web sites earlier this week involved the use of a "bot net"--a large network of zombified home PCs--Internet infrastructure provider Akamai Technologies said Wednesday."
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These trouble makers are up to no good again. DDoS attacks are getting more and more sophisticated, according to Akamai. This one coming apparently coming from a huge network of bots likely working from unsuspecting computer owners' machines to cause havoc. Kind of scary news for website owners. Fortunately it's normally the big guys that get targeted, and they are typically the ones with the resources to handle this type of an attack, or at least recover quicker than the little guys. But it's scary nonetheless.