<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">This article analyzes distributed cyberattacks of the “Denial of Service” type and develops their classification. A description of the shortcomings and vulnerabilities of distributed denial-of-service attacks by category is given. An implementation diagram with examples for each category of distributed denial of service attacks is presented. Analyzed the number of attacks carried out by attackers, as well as the purpose and type of attack used. According to the results of the study, the UDP-flood 53.64% attack type is the most commonly used type by attackers in implementing distributed attacks, and the GRE-flood 1.41% is defined as the least used type. Distributed denial of service attacks are the major concern for security experts. This paper can be helpful for researchers and cyber security experts to provide a better understanding of distributed denial of service attack tools in present times.</span></span></p>