The U.S.-South Korea cyberattack: How did it happen? - PC World

It sounds like an advanced operation: Hackers hit dozens of high-profile Web sites, knocking the Federal Trade Commission and other government groups completely offline. Days later, South Korea gets a wave of the same treatment.

The description may seem shocking, but a recent series of attacks on U.S. and South Korean Web sites was actually far less sophisticated than one might think. Security researchers are gaining a better understanding of what exactly happened, and why it caused so many major sites to go down...