DoS attack, denial-of-service attack, is an explicit attempt to make a computer resource unavailable by
either injecting a computer virus or flooding the network with useless traffic. In simple words, it is similar to thousands of people trying to enter a room from a single entrance, ultimately causing havoc. This not only disturbs the normal operations of the network but also results in poor performance and system breakdown due to overwhelming requests. A large-scale DDoS attack (ranges up to 400 GBps) can affect the internet connectivity of an entire geographical region.
There are two types of DoS attacks: computer attack and network attack. Common
forms of denial of services attacks are: