A method and associated system for detecting intrusion of a wireless network. A determination is made that a first data stream received by the wireless network does not include N1 communication protocols included in a second data stream previously determined to be valid, N1 being a positive integer. A determination is made that N1 exceeds a predetermined first tolerance, and in response, that the first data stream does not include N2 communication protocols included in a third data stream previously determined to be intrusive to the wireless network, N2 being an integer equal to or greater than zero. A determination is made that N2 is less than a predetermined second tolerance, and in response, an alert that the received data stream is potentially intrusive to the wireless network is generated.