Radwares 2011 Global Application & Network Security Report debunks DDOS myths. 76 percent of DDoS attacks were less than 1Gbps in bandwidth, with 32 percent less than 10Gbps. Only nine percent of attacks in 2011 were over 10Gps. Radware’s ERT found that the type of attack is also significant. A much smaller HTTP flood on the application level may do more damage than a larger UDP flood. Firewall or IPS alone can stop DDoS.”]
Source: https://blog.radware.com/security/2012/02/ddos-attacks-myths/