a6c13197-6954-40f1-9135-f0a898b7e4eb20211116080229301naun:naunmdt@crossref.orgMDT DepositInternational Journal of Applied Mathematics and Informatics2074-127810.46300/91014http://www.naun.org/cms.action?id=3064319202131920211510.46300/91014.2021.15https://www.naun.org/cms.action?id=23306DanaProchazkovaFaculty of Transport Science Czech Technical University Konviktska 20, 110 00 Praha 1 Czech RepublicJaroslavSrpFaculty of Transport Science Czech Technical University Konviktska 20, 110 00 Praha 1 Czech RepublicJanProchazkaFaculty of Transport Science Czech Technical University Konviktska 20, 110 00 Praha 1 Czech RepublicThe aim of the paper is to show that all cyber networks (such as telecommunication, IT or ICT networks) are systemically identical or very similar, although each of them is applied in another industry or economy field or includes other added functional elements. The effort is to show that systemic identity (similarity) of the mentioned networks identifies the same set of network security threats that can be solved using the same approaches and techniques. The integrative approach based on the systematic approach enables to effectively use the efforts of professionals and all means target to the actual problem solving. The mentioned networks classification to the cyber critical infrastructures is also made based on this concept. Cyber system and cyber networks are threatened by both, the internal system deficits (technical and organisational nature) and the wide range of disasters: natural disasters - impacts primarily on the technical resources; intentional events caused by human vandalism, theft, terrorist attacks; technological accidents; and failure of electricity supply; etc. They threaten individual humans, human groups and states by their technical and organisational deficits and by the IT disuse.111620211116202147548https://www.naun.org/main/UPress/ami/2021/a162013-008(2021).pdf10.46300/91014.2021.15.8https://www.naun.org/main/UPress/ami/2021/a162013-008(2021).pdf10.1109/37.969131S.M. Rinaldi, J.P. Peerenboom, T. K. Kelly, Critical Infrastructure Interdependencies. (Identifying, Understanding, and Analyzing). In: IEEE Control Systems Magazine, Vol. 21, December 2001, pp.12-25. www.ce.cmu. edu/~ hsm/im2004/readings/CII-Rinaldi.pdf Qiao Linag, Wang Xiangsui, Unrestricted Warfare (trans. Foreign Broadcast Information Service). Beijing, China, February 1999. 10.1201/9780203859759.ch259D. Prochazkova, Critical Infrastructure Safety Management. In: Reliability, Risk and Safety. Theory and Applications. ISBN 978-0-415- 55509-8, CRC Press / Balkema, Leiden 2009, 1875-1882, ISBN 978-0-203-85975-9. J. Prochazka, D. Prochazkova, Cyber Infrastructure – Identification of Critical Spots and Impacts of Its Failure. CYTER2012, ISBN 978-80-01-05072-9, ČVUT, Praha 2012. J. Srp, D. Prochazkova, Analysis of Cyber Networks in System Concept. CYTER2012, ISBN 978-80-01-05072-9, ČVUT, Praha 2012. D. Prochazkova, Strategic Management of Safety of Territory and Organisation [In Czech]. ISBN: 978-80-01-04844-3. ČVUT, Praha 2011, 483p. D. Prochazkova, Analysis and Management of Risks. ISBN 978-80-01-04841-2, ČVUT, Praha 2011, 368p. Tutor2u, Introduction - What Is ICT?. Tutor2u [online]. 1998. http://tutor2u.net/business/ict/ intro_what_is_ict.htm G. Knight, Internet Architecture. University College London, 2006, 24 p. J. Srp, Geolocation and Geolocation Techniques. Datakon 2011: Tutorials. Mikulov: VUT, Brno, 2011, pp. 23-48. ISBN 978-80-214-4330-3. D. Prochazkova, Critical Infrastructure Safety. ISBN 978-80-01-05103-0. CVUT, Praha, 310p. V. Svoboda, M. Svitek, Telematics Under Traffic Networks. ISBN 80-01-03087-3. CVUT, Praha 2004, 263p. P. Moos, T. Zelinka, V. Malinovsky, Telecommunication Services. ISBN 978-80-01- 03598-6. CVUT, Praha 2007, 176p. D. Prochazkova, Methods, Tools and Techniques for Risk Engineering. ISBN 978- 80-01-04842-9, CVUT, Praha, 369p. FEMA, Guide for All-Hazard Emergency Operations Planning. State and Local Guide (SLG) 101. FEMA, Washinton 1996.