This thesis is concerned with data wiring infractructure. In the theoretical part the basic technology of the LAN networks is described as well as its parts, such as HUB and switch. Various types of transfer paths used in data wiring are briefly mentioned. They included coaxial cable, which were then replaced by shielded twisted pair and in future the fibre optics cables will be used instead. The shielded twisted pair operates on structured cabelling, which is guided by central principles in designing, which then can guarantee 15 years of good service. The most used cables 5e and 6 are described. The next chapter describes the endings of cables and connectors as well as the principles of patch pannels and patch cables. The following parts focus on the fibre optics networks, because they are the networks of the future. The types of fibre optics cables are described together with networks standards, the minimal fibre radius and innovations such as WDM or micropipes. There is also a resume of the ČSN norms, which are important for this thesis, concerning issues of the ways how to lay cables, placing of the communications etc. In the practical part, the various softwares for designing data wiring infractructure are studied and compared. As the most convinient for student proposals the AutoCAD Electrical 2011 has been chosen. This design software is studied from the point of view of its user interface and basic rules of behaviour. The functions of the menus and pripary settings are described. In the last part of the thesis the lesson is provided. The lesson should give students basic information and opportunity to design a basic data wiring infrastructure for a building.