Distributed Denial of Service (DDoS) attacks are some of the oldest Internet threats and continue to be the top risk to networks around the world. As protections have evolved, the technology used by hackers has adapted and has become much more sophisticated. New attack types now target applications and services, and many times they’re masked in bulk layer 3 and 4 DDoS events making it difficult to detect them. There are many ways to test your DDoS defenses ranging from free options to dedicated appliances that can simulate a broad range of basic and advanced DDoS types.”]
Source: https://www.bankinfosecurity.com/whitepapers/your-data-center-ready-for-todays-ddos-threats-w-1111