ROLE OF DENIAL- OF -SERVICE IN NETWORK SECURITY

We know that in network systems it is not possible to avoid Denial-of-Service attacks. Denial-of-Service attacks will play important role on security as well as on through put. As Security has their own vulnerability to DoS, this paper studies how to avoid the risk of DoS in security and through put. In this context, we begin building attacker capabilities and a basic network to model the actual protocol operation. Secondly we build an advanced model for evaluation of the risk. After defining the intruder capability with a basic model, the risk evaluation model gives the "Risk-Evolution-Factor" (REF) for the Security and through put. The "Risk- Evolution-Factor" is going to presents the amount of computing resources is expected to lose with a specified level of confidence in security and through put. This model can help end users to have a good understanding of the protocols structures, what they are using, and in addition to that provide help developers and designers to examine their developments and designs and get hints to improve the same.