When wireless network engineers are planning for WLAN networks, what is the purpose of using RF emulation? (Multiple Choice)

MIMO (Multiple input and multiple output), that is, multiple input and multiple output, wireless access points and clients using 802.11n technology can simultaneously transmit data using up to three spatial streams, and the theoretical rate can reach 600 Mbps.

In the frame of 802.11, which Address bits represent the frame Address at the receiving end?

How many channels does China support in the 2.4 GHz band?

What is the range of working frequency specified by China in the 2.4 GHz band?