The number, size and impact of distributed denial of service (DDoS) attacks increased sharply in the first quarter of this year, according to a new report from Prolexic. The average attack bandwidth in this period was 48.25 Gbps, 718 percent more than the 5.9 Gbps chalked up by attacks in the previous quarter. The average packet-per-second rate hit 32.4 million, and the average duration of an attack increased 7.14 percent.