Article 8318

Title of the article

THE ESTIMATION OF EFFICIENCY OF FUNCTIONING OF NETWORKS 

Authors

Porshnev Sergey Vladimirovich, doctor of technical sciences, professor, sub-department of general professional disciplines
of technical specialties, Ural Institute of Communications and Informatics (620109, 15 Repin street, Ekaterinburg, Russia),
E-mail: sergey_porshnev@mail.ru
Budyldina Nadezhda Veniaminovna, candidate of technical sciences, professor, sub-department of general professional disciplines
of technical specialties, Ural Institute of Communications and Informatics (620109, 15 Repin street, Ekaterinburg, Russia),
E-mail: bnv@mail.ru
Stoichin Krasimir Ludmilov, postgraduate student, Ural Institute of Communications and Informatics (620109, 15 Repin street, Ekaterinburg, Russia), E-mail: k001kk96@mail.ru
Shabrov Andrey Veniaminovich, postgraduate student, Ural Institute of Communications and Informatics (620109, 15 Repin street, Ekaterinburg, Russia), E-mail: shabrov-av@yandex.ru 

Index UDK

004.732 

DOI

10.21685/2307-4205-2018-3-8 

Abstract

It is shown that if the computer networks (CS) are incorrectly configured, a part of the services may not be available to the user. An analysis of existing approaches to solving this problem is given. A common disadvantage is the lack of consideration of the characteristics of the architecture of the COP when assessing the effectiveness of the COP. The actual problem of a reasonable choice of criteria for evaluating the functioning of the CS, taking into account the network architecture features, has been set and solved. A scientific substantiation of the choice of these criteria is proposed and the corresponding estimates confirming the validity of their choice are given. A criterion for the effectiveness of the functioning of the CS, based on an analysis of the time of its reaction, was obtained. It is shown that the availability factor of the CS depends on the specific service that the user turned to, the location of the corresponding computer in the CS where the service is located, the CS architecture and the workload of the CS segments through which the request and response is transmitted. At the same time, the response time of the CS, which is often interpreted by the user as a failure of the network application, is unacceptable from the user's point of view, which naturally leads to the failure of the solved task, as a rule, due to data processing at the upper levels of the open systems interaction model. relationship to the processes and, in fact, the quality
of the functioning of the COP, but determined by the workload of customers. Criteria for evaluating network performance are given. To confirm the efficiency of the selected criteria for evaluating the functioning of the CS, the OpNET Modeller system was simulated. The technique of computer network modeling is given. The results are shown as a graph of the dependence of the delay time on the measurement time for the peer-to-peer segment of the computer network. The delay times are tabulated. It is shown that the value of the criteria really turns out to be dependent on the architecture of the peer-to-peer segment of a computer network. Thus, the work justified the choice for evaluating the functioning of the network. The performance of the proposed criteria is confirmed by the results of simulation and analytical assessments. 

Key words

corporate network, data transmission, threshold criterion, weighted average criterion, time between failures, recovery time 

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Дата создания: 04.02.2019 12:53
Дата обновления: 04.02.2019 14:25