eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2015-04-28 12 1 737 744 6129 article Gulmira Asaugalikyzy Shangytbayeva 1 Bahytzhan Srazhatdinovich Akhmetov 1 Roza Nuralievna Beysembekova 1 Mikolaj Petrovich Karpinski 2 Erbol Amangazyevich Ospanov 3 Kazakh National Technical University after K.I. Satpayev, Republic of Kazakhstan, 050013, Almaty, 22a, Satpayev Street. Academy of technologies and the humanities in Bielsko-Biala, Poland, 43-309, Bielsko-Biala, 2, Willowa Street. Semey State University named after Shakarim, Republic of Kazakhstan, 071410, Semey, 20a, Glinka Street. This paper deals with the questions of computer network, attacks, threats, network attacks, “Denial of Service”, DoS – attacks, DDoS – attacks, DRDoS – attacks, mathematical model. The article presents an approach to detection of the distributed network attacks to refusal in service, the offered method increases efficiency of use of the calculated resource of a computer network at the big distributed network attacks to “Denial of Service”. The paper proposes a mathematical model of compromised node and the number of all possible routes that can have an admission to access points, have done a comparative characteristics of attacks DoS / DDoS / DRDoS in computer network. https://www.biotech-asia.org/vol12no1/research-distributed-attacks-in-computer-networks/ Attacks; Threats; Network attacks; Computer network; DoS -attacks; DDoS-attacks; DRDoS-attacks; Mathematical model