Distributed Denial of Service attack otherwise known as DDoS attack is a common way of disrupting the traffic of a particular website or server in order to make network resources unavailable to users/visitors. At worst, these attacks can be used to bring down a server or website completely. Types Basically there are two tyDistributed Denial of Service attack otherwise known as DDoS attack is a common way of disrupting the traffic of a particular website or serverpes of such kind of attacks DoS- initiated by a single user or system DDoS- an attack sent by multiple users or bots. Targets According to e-Week, on average 28 DDoS attacks originate on hourly basis as of 2014. Reasons for such attacks are multiple but mainly such attacks occur in order to attack a particular website’s servers. DDoS attack initiators mostly target website servers of high profile businesses like banks, credit card companies and other financial companies. In recent times, DDoS attack in general and DoS attacks in particular have been used as a source of revenge and attacking the rivals. These attacks are best described by a free software activist, Richard Stallman, as “Street protests