One of first publicized denial-of-service (DoS) attacks appeared in February 2000 when a 15-year old Canadian flooded the servers of various online retailers, including Amazon and eBay. The tools and techniques to execute such a salvo were being researched and developed for years prior to the attack.
Back in the day, there were three basic types of DoS attacks-
Consumption of scarce, limited, or non-renewable resources
Destruction or alteration of configuration information
Physical destruction or alteration of network components
grupoed2k@localhost ~]# home