Computer networks are a critical factor for the performance of amodern company. Managing networks is as important as managing any otheraspect of the company’s performance and security. There are many tools andappliances for monitoring the traffic and analyzing the network flow security.They use different approaches and rely on a variety of characteristics of thenetwork flows. Network researchers are still working on a common approachfor security baselining that might enable early watch alerts. This researchfocuses on the network security models, particularly the Denial-of-Services(DoS) attacks mitigation, based on a network flow analysis using the flowsmeasurements and the theory of Markov models. The content of the papercomprises the essentials of the author’s doctoral thesis.
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