Distributed Denial of Service (DDoS)

A Distributed Denial of Service Attack or DDoS attack, like a DoS attack, attempts to make systems and services inaccessible by overwhelming them with so many requests for data that they can no longer respond to any requests. While a DoS attack is run from one attacking system, a DDoS attack is run from multiple systems at the same time, making it even more difficult to thwart. DDoS attacks typically originate from bot nets.