"Before, the attack had to get to your premises before you could mitigate it. So you had to have massive pipes sitting there idle with tens of gigabytes of capacity," he says. "You had this large capacity infrastructure that you had to buy and maintain, but you also had to have large opex and personnel expenses. By moving this service into the cloud, the pipes are no longer an issue. You no longer have the capex because it's done as a service with a low monthly fee and no excess bandwidth.''[networkworld.com]

Interesting approach ...