Kopytoff, Verne. Cyber attack interrupts Internet services. SFGate.com. June 16, 2004.

If you couldn't get to Google yesterday, here's why. Cyber attack interrupts Internet services: "However, others said the incident had the hallmarks of a denial-of- service attack, a relatively frequently used technique to disrupt Web sites. Such attacks are often the result of a hacker surreptitiously taking control of other people's computers, then using them to overload a target with data or electronic requests. "