This master's thesis compares wireless technologies which they are used at current time. The most of information in this thesis are obtained from my practical experiences with design and realization of wireless network during last four years. The thesis briefly describes standards and security of WiFi. More time is devoted to the description of new standard 802.11n and the E-Band. The use of E-Band is allowed in Czech Republic from a year 2008. The thesis describes a practical evaluation of wireless network 802.11a/b/g/n and E-Band. Examples of the use are described in case studies of high-speed point-to-point wireless bridge, coverage of a logistic warehouse and wireless network with location in a hospital