US Patent 7730536 Security perimeters

A security system that is associated with a customer network includes first, second, and third security perimeters. The first security perimeter includes a set of content delivery network (CDN) devices configured to provide first protection against a network attack associated with the customer network. The second security perimeter includes a set of mitigation devices configured to provide second protection in terms of mitigation services as a result of a network attack associated with the customer network. The third security perimeter includes a set of hierarchy devices configured to provide third protection against a network attack associated with the customer network.