During the last couple of years, Distributed Denial of Service Attacks (DDoS) have gotten a lot more popular, due to the fact that they’re cheap and easy to carry out, and they basically require no effort whatsoever once a stable script is put into place.
For those who do not know, DDoS attacks take advantage of one of the biggest vulnerabilities of serves- the fact that they can only handle a set amount of connections or traffic at the same time. Based on this, they basically flood server with requests, which in turn, either slows or takes sites down completely.