Date Added: Aug 2012
Network introduces security problems, threats, risks and other types of attacks like internal and external attack. DoS is the most debilitating attack in the Internet and yet it still remains an open research topic. Distributed Denial of Service (DDoS) attacks have emerged as a popular means of causing mass targeted service disruptions, often for extended periods of time. The relative ease and low costs of launching such attacks, supplemented by the current inadequate sate of any viable defense mechanism, have made them one of the top threats to the Internet community today.