As shown in the figure, STA_1 through STA_4 are associated with AP_1, and STA_5 is associated with AP_2. Assuming that the load balancing threshold is 2, the load difference threshold is 25%, and API and AP2 support a maximum of 10 STAs, which of the following statements are true? (Select All that Apply)

Which of the following statements about fingerprint-based positioning technology are true? (Select All that Apply)
Which of the following items is not involved in the HLD phase?
In Huawei's smart roaming solution, which of the following methods can be used by a WAC to discover and maintain neighboring AP entries of STAs? (Select All that Apply)
Either of the two APs that have established a mesh connection can send a Mesh Peering Close frame to the other AP to tear down the mesh connection.
With protocol trace, iMaster NCE-Campuslnsight displays protocol-level Interaction details at the phases for wireless users. (Enter the acronyms in capital letters.)

With protocol trace, iMaster NCE-CampusInsight displays protocol-level interaction details at the AP, WAC, and AC phases for wireless users.
References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/protocol-trace
Master NCE-Campuslnsight analyzes network issues during correlation analysis of poor-QoE clients, including coverage, interference throughput, and hardware issues.