A Distributed Denial of Service (DDoS) attack sees large collections of remotely controlled computers target a specific entry point or service. DDoS attacks can reduce the availability of a service for even some of the larget technological companies on the planet. Recent high-end DDoS attacks see hundred of thousands of botNet infected PCs swamping networks and connections with hundreds of gigabits per second. Network routing, connections and hardware can easily be totally saturated. Higher OSI7 layers, such as the application or presentation layers, suffer hugely against DDoS attacks. That’s not to say layers such as the physical or network can’t be specifically targeted either.