International Journal for Technological Research in Engineering (IJTRE)
DDoS attack is a coordinated attack on massive scale and it is a major threat in current computer networks. It is not easy to detect the attack, the seriousness of the DDoS problem and the increased frequency of DDoS attacks have led to the advent of numerous DDoS defense mechanisms. Detection mechanism is the first step to avoid the DDoS attack. Some of these mechanisms address a specific kind of DDoS attack such as attacks on web servers or authentication servers. The defense system taxonomy is illustrated using only the currently known approaches.