Denial of Service attacks or Distributed Denial of Service attacks are cyber security attacks where a website is flooded with malicious traffic making it unusable. Research by Radware, found these attacks had greatly increased in 2021 – where it was also discovered that ransomware gangs have been using these attacks to bring extra pressure on their victims.
DDoS attacks expand as cybercriminals target cloud providers and ransomware victims | TechRepublic
A knock on effect from these types of attacks is the wasted internet bandwidth they cause – for example, “For 2021, the average volume in attacks seen by Radware ranged from 4.6 TB to 51.65 TB.”