When measuring DDoS attacks, Google looks at three main metrics: bits per second (bps) for attacks targeting network links, requests per second (rps) for attacks targeting application servers, and packets per second (pps) for attacks targeting DNS servers and network devices.
The tech giant says DDoS attacks have increased significantly over the past years in each of these metric categories.
In terms of bits per second, Google spotted the largest attack in September 2017. The attack was aimed at the company’s infrastructure and it reached 2.5 Tbps, being described by Google as “the culmination of a six-month campaign that utilized multiple methods of attack.”