During the STA access process, a link authentication phase is required. During this phase, which of the following security policies supports the shared key authentication mechanism?

A client device is experiencing slow performance due to high interference on the 2.4 GHz band.
The network administrator needs to direct the device to use the 5 GHz band. What should be done?

Drag and Drop Question
In the NIMO system, the MIMO system can be divided into SU-MIMO system and MU-MIMO system according to the number of users. Please match the following system categories with their corresponding meanings and characteristics.

In order to ensure the security of WLAN network, a shopping mall adopts MAC authentication as the access authentication method of dumb terminals. When configuring security policies, which of the following security policies can engineers choose? (Multiple choice)

An engineer is optimizing the wireless network at a customer site. The channel utilization of the AP in the current network is too high, and the interference is large, resulting in a poor user experience. The engineer turns on automatic radio frequency tuning on the wireless controller, but finds that it does not take effect.
Which of the following options may be the cause of the failure of RF calibration? (Multiple choice)