By default, wireless devices keep sending Probe Request packets that include the SSID
field to scan their nearby wireless networks. After receiving such packets, this device
determines whether the wireless devices are allowed to access its wireless networks
based on the packets and responds using the Probe Response packets (including all
Beacon frame parameters), which consumes a lot of wireless resources.
After this function is enabled, this device does not respond to the requests without an
SSID, saving wireless resources.