The first large-scale DDoS attacks were carried out on big companies such as Yahoo!, eBay, and CNN in early February 2000, and since then the development of mechanisms to combat DDoS attacks was the focus of practitioners and researchers. During this period, a lot of investigations were carried out on this topic. Several important review papers were published analysing the taxonomy of DDoS attacks, attack mechanisms, the existing architectures and methods for protecting against DDoS attacks, their advantages, and disadvantages.
There are several types of DDoS attacks (Singh & De 2017):