DDoS attack activity at a glance During Q1, Akamai mitigated more than 4,500 DDoS attacks, a 125 percent increase compared with Q1 2015. As in recent quarters, the vast majority of these attacks were based on reflection attacks using stresser/booter-based tools. These tools bounce traffic off servers running vulnerable services such as DNS, CHARGEN, and NTP. In fact, 70 percent of the DDoS attacks in Q1 used the reflection-based DNS, CHARGEN, NTP, or UDP fragment vectors More than half of the attacks (55 percent) targeted gaming companies, with another 25 percent targeting the software and technology industry. Q1 2016 also set a record for the number of DDoS attacks exceeding 100 Gigabits per second (Gbps): 19. The largest of these mega attacks mitigated by Akamai peaked at 289 Gbps. 14 attacks relied on DNS reflection methods.