In modern society, computers can be used in any field of human activity. The level of use of computing depends on how developed a particular country is. The richest countries are the most developed in the IT (information technology) field. The countries with the greatest natural resources: gas, oil, metals, etc., are not always the richest. Likewise, among the richest companies are also those in the IT field. Of the top 10 companies in the world, more than half are from the IT domain, which means that mean that billions of dollars are spent annually on the IT field. This results in the efficient utilization of allocated resources, so that the use of IT tools allows accessing and transferring information as quickly and comfortably as possible. Information can be managed from home, work, on the go. When we use IT tools at home, at work, we are talking about data transfer in local networks. The larger the network is (number of users, number of computers), the more stringent the requirements are. An important factor in meeting these requirements is how efficiently the data transfer medium is used.