Which facility ensures that clients with radio signal strength poorer than -90 dBm can't connect to wlan1?

The access list is a key feature used in wireless networking that allows administrators to define conditions under which clients can connect to a specific wireless network (in this case, wlan1). By utilizing this mechanism, one can set parameters that evaluate the signal strength of a client's connection attempt.

When the access list is configured to reject clients with a signal strength poorer than -90 dBm, it effectively prevents these clients from establishing a connection to the WLAN. This is particularly important in maintaining network performance, as clients with extremely weak signals are likely to experience high packet loss and instability, which can degrade the overall quality of service for other users on the network.

The access list thus serves as a gatekeeper, ensuring that only clients with sufficiently strong signals can authenticate and use the network, which is essential for optimal network operation and reliability.