Performance Evaluation and Structure of the Equipment of Local Computer Networks

Abstract

Computer networks are currently used in the transmission of information of various types. As the complexity used in network applications, there is an increase in bandwidth, reliability and network protection, the possibility of its effective management, and where possible, reduce the cost of operation. In the paper the consideration is being given to improve the performance of computer networks, both from the point of view of their cost, so the transfer of information. The paper presents an information system unit valuation a local area network. The database stores information about which types of local area networks, cables, network cards, switches, routers, bridges. To calculate the value of the local computer network use has been used the correlation approach. As input parameters were used: the type of traffic, the number of of-fices that host computers, number of computers in each classroom, the number of servers, the presence of floors. The output result is the equipment included in the designed local area network. For the vector of correlation coefficients using the standard procedure are the largest numbers that meet the required telecommunications facilities in accordance with the input parameters. The analysis methods used in the analysis of the characteristics of computer networks. The objective of the assessment for the computer network flow in the communication line between the neighbouring routers, depending on the number of subscribers connected to each node, and the traffic intensity. Restrictions are the maximum value of the bandwidth of a certain area, and the performance of the node in the network. To estimate the maximum value of the traffic that is transmitted in a computer network, used simplex method that allows us to consider the performance of the switching nodes. A mathematical model is developed for assessing the capacity of communication channels given the amount of traffic transmitted in the switching nodes and the bandwidth of the switching nodes. The algorithm is implemented in the software product. On the basis of the obtained results it is possible to perform optimization under the given requirements, as the cost of computer networks, and traffic and bandwidth of its elements.