Regarding the wireless client roaming among multiple H3C wireless controllers, which of the following statements is true ______

• A. When the user goes offline, FA will notify HA, and HA will notify other AC users in the roaming group to go offline
• B. To realize client roaming between multiple wireless controllers, multiple wireless controllers need to be configured into the same roaming group, and the wireless controllers will automatically negotiate and establish an I ACT P tunnel as the wireless xxx
• C. After a wireless terminal associates with a wireless controller for the first time, the wireless controller is the HA of the terminal. After roaming occurs, the newly associated controller
• D. When roaming occurs, the user's newly accessed AC will be called the user's FA. When roaming occurs again, the user's HA remains unchanged, and the FA is replaced with the AC that was accessed last time
• E. When the user associates with any AC (HA) in the roaming group for the first time, the terminal will obtain the service, after that, the authorization information of the terminal will be synchronized to other ACs in the roaming group by the HA

What modules are included in the WLAN optimization service product:

• A. WIFI network AC special optimization service
• B. WIFI network optimization management system
• C. WIFI Network Optimization Evaluation Service
• D. AC Log Analysis System
• E. WIFI network quality of service element testing service
• F. WIFI network optimization implementation service

When WA2220X-AGP works as a bridge under 11a, by default, it can

• A. 2; 30
• B. 2; 15
• C. 4; 30
• D. 4; 15

The wireless user speed limit methods supported by FAT AP include:

• A. Rate limit based on client negotiation rate type
• B. Speed ​​limit based on client signal strength
• C. Static rate limit (specify per-user bandwidth limit under the same SSID)
• D. Dynamic speed limit (users under the same SSID share the set bandwidth)