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Theoretical information about network equipment and protocols for their interaction, information about implemented hardware, such as switches and routers in connection with the active spread of such a profession as a programmer are considered in the article. The introduction of a large number of information equipment in people's lives has led to a global transformation of the digital space. Due to the digital transformation and the need for uninterrupted and high-quality sending of information over long distances with minimal losses, as well as the need to introduce theoretical and practical material on modern technologies for information data transmission networks, principles for constructing telecommunications systems and networks are being developed, specialized hardware for resolving configuration issues by checking the functionality of networks is being designed. In the work, authors have analyzed the demand for the transfer of information data today, have noted the principles of interconnection and building of local networks, have reflected the revised and supplemented material of the manuals. Information about the functioning of devices is also presented on the example of CISCO software and hardware. Based on the studied data, a step-by-step instruction has been developed to teach students to network security technologies, gain theoretical knowledge about the main commands used in the Cisco IOS operating system and about the concept of configuration. It is noted that in order to carry out proper configuration of network equipment, it is necessary to use a software network emulator called Cisco Packet Tracer. On the basis of the data, a laboratory work has been developed. This laboratory work allows to develop the professional competencies of young specialists. Due to the presented work, engineers consider the features of the operation of switches and routers, study the routing of networks and other software and hardware devices.
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