H3C's outdoor wireless AP products include ___. (Multiple choice)

The signal strength I Mean RSSI displayed by the wireless device can directly reflect the quality of the link, but the actual noise floor is related to the environment and interference and will change from time to time. While the RSNR is relatively stable (for a fixed environment and transmit power), It can be considered to be related to the transmission power, the antenna used by the equipment, the distance of the equipment, the space attenuation, etc., but when the equipment is installed, the RSNR is often relatively fixed.
The following description of the relationship between noise floor and I RSSI, which is correct?

The name of the 802.11 security mechanism standard is?

T FAT/FIT operation mode is smoothly switched C H3C wireless access point device unique specifications, which of the following P AP series have switching capability? (Multiple choice)

In the wireless controller, the following configuration makes the client unable to search for the wireless signal, what is the possible reason? (Multiple choice)
wlan service-template 2 crypto ssid h3c-wlan authentication-method open-system
cipher-suite wep40 wep default-key 1 wep40 pass-phrase 12345