110、The signal strength RSSI displayed by the wireless device can directly reflect the quality of the link, but in fact, due to the fact that the noise floor is related to the environment and interference, it will change from time to time; while the SNR is relatively stable (for a fixed environment and transmit power), it can be considered and transmitted Power, the antenna used by the device, the distance of the device, and spatial attenuation are related, but after the device is installed, the SNR is often relatively fixed.
Which of the following statements about the relationship between bottom and RSSI is correct.