Which of the following materials does the WLAN signal pass have less penetration loss? (Multiple choice)

The distance between two channels' Center frequency is equal to or less than 25 MHZ, it exists overlap between channels, which will cause some interference, so when channel planning in the adjacent area, in order to avoid the adjacent frequency interference, the same channel is not allowed to use.

To create a user for Huawei's AC, first use the aaa command to enter the view.

To configure a WLAN service, you need to add an AC to the U2000.

Which of the following option is a prerequisite for starting load balancing function based on AP?