The customer's existing network has configured inter-WAC roaming. The engineer checked the information of the roaming group on the wireless controller and found the following description of the roaming group. Which one is wrong?

In a WLAN network, the WLAN theoretical rate refers to the Wi-Fi air interface link establishment rate. Different Wi-Fi protocol standards correspond to different WLAN theoretical rates. Which of the following factors affect the theoretical rate of WLAN? (Multiple choice)

In the network planning process, user concurrency rate is one of the important parameters for network capacity design. Which of the following descriptions about user concurrency rate is correct?

In the WAC+FITAP networking mode, which option field of the DHCP protocol can the AP use to discover the WAC device?

As shown in the figure, in the parking lot scenario, it is recommended to deploy APs above the lanes and deploy APs separately at intersections to ensure signal coverage continuity.