On Huawei iMaster NCE-Campus, key users can be set as VIP users. Which of the following statements are true about VIP users?

The VIP user assurance feature on Huawei iMaster NCE-Campus is a comprehensive solution designed to guarantee a superior network experience for critical users. It allows administrators to define VIPs, such as executives or conference hosts (A), and then applies a suite of O&M and QoS policies. The system proactively monitors the connection quality of these VIPs in real-time and generates alarms if their experience degrades below a set threshold (B). To ensure performance, the solution leverages technologies like Air Slice, which reserves dedicated airtime and bandwidth resources on the Access Point (AP) for VIP users, minimizing contention and interference (C). This resource allocation is dynamic; when a VIP user is offline, the reserved resources are released back to the general pool for use by other non-VIP users, ensuring efficient spectrum utilization (D).

As all provided options accurately describe the functionalities of the VIP user feature on Huawei iMaster NCE-Campus, this section is not applicable.

1. Huawei iMaster NCE-Campus Product Documentation, "Feature Description - WLAN Service Experience Assurance". This document details the VIP User Experience Assurance function. It states, "iMaster NCE-Campus preferentially guarantees the experience of VIP users and monitors their experience in real time. If the experience of a VIP user deteriorates, iMaster NCE-Campus reports an alarm to the network administrator." This directly supports options A and B.

2. Huawei CloudCampus Solution White Paper, "WLAN Experience Assurance". This white paper explains the underlying technologies. In the section on Air Slice technology, it describes how dedicated radio resources (slices) are reserved for VIP users to guarantee bandwidth and low latency, confirming option C. It also clarifies that this slicing is dynamic, allowing resources to be used by general users when VIPs are inactive, which supports option D.

3. Huawei iMaster NCE-Campus Administrator Guide, "O&M > Monitoring Settings > VIP User Management". The guide provides configuration steps for defining VIP users and describes the outcome: "After a user is configured as a VIP user, the system preferentially guarantees the network experience of the user and monitors the user's network quality in real time." This confirms the core principles outlined in all four options.