The paper looks at the problem of jamming attacks on wireless IEEE 802.11 networks. It can be seen from experiments that the use of broadband interference does not always give a better result than narrowband interference. When using narrowband interference with the imposition of pilot sub-carrier, the number of lost packets was 11%, and the average delivery time of a packet increased by an order of If the hot spot supports the ability to hop to a different frequency, or even to a different frequency range, then communication is interrupted for half a minute. Broadband interference reduces throughput by a factor of approximately 19 times, and packet loss averages 4%.