In today's info-security threat landscape, denial-of-service and distributed denial-of-service (DoS/DDoS) attacks are a major cause of network downtime. Whether executed by hacktivists to draw attention to a cause, fraudsters trying to illegally obtain data or funds, or a result of geopolitical events, DDoS attacks are a destructive cyber weapon. Governments, utilities, financial services and commercial institutions face daily attacks. Preparing for "common" DDoS attacks is no longer enough. Thanks to the growing array of online marketplaces, it is now possible for hackers to wreak havoc with virtually no knowledge of computer programming or networks. Attack tools and services are easy to access, making the pool of possible assaults larger than ever. With Burst attacks and Advanced Persistent DDoS campaigns, hackers launch multi-vector, blended campaigns with high-volume network vectors with more sophisticated application-layer attacks.