International Journal of Computational Engineering Research (IJCER)
Denial of Service (DoS) or otherwise generally known as packet flooding over the network. This leads to exploitation of OS and causes major security threats. Worms and viruses are also poses security issues which are not related to denial of service attack. In general, denial of service is nothing but flooding of unrelated information over the network. This causes, overload of network and higher bandwidth consumption. Therefore particular service requested by authorized user cannot receive at particular time. Thus causes larger security threat in network. When these system get distributed (distributed network), the mitigation becomes very complex. In existing technique the DoS has been mitigated using many filtering technique.