The symptoms described-intermittent connectivity and thousands of connection attempts from unrecognized devices-strongly suggest a denial of service (DoS) attack. This type of attack typically involves overwhelming a network service with excessive requests, in this case to the wireless access point (WAP), which prevents legitimate network traffic from being processed effectively. Options like wrong SSID, interference, and poor coverage do not explain the high volume of connection attempts and are less likely to cause such a specific connectivity disruption pattern.