Hit and Run DDoS attacks are composed by a series of short bursts of high volume attacks, having a limited duration, and are arranged periodically to interfere with target operation. The attacks last for days or weeks, they are usually enough to saturate targets resources. The typical DDoS defense solution works well for long DDoS attack, but their response time is too long to face with short DDoS. DDoS protection services are built for protection, not content delivery, and don’t offer such features.”]
Source: http://securityaffairs.co/wordpress/24605/cyber-crime/understanding-hit-run-ddos-attacks.html