Comprehensive and Detailed Step-by-Step Explanation:
1. Features of Wi-Fi 6:
Wi-Fi 6 (802.11ax) introduces several new technologies to improve network efficiency, reduce latency, and optimize power usage:
OFDMA (Orthogonal Frequency Division Multiple Access):Allows multiple devices to transmit simultaneously, improving concurrency.
TWT (Target Wake Time):Reduces power consumption by scheduling communication times for devices.
High Bandwidth:Supports up to 9.6 Gbps, significantly faster than Wi-Fi 5.
2. Why Zero Latency is Incorrect:
While Wi-Fi 6 reduces latency compared to earlier standards,zero latencyis not achievable due to inherent delays in network communication.
The statement "Realizes zero latency" is misleading and technically inaccurate.
3. Analysis of Each Option:
Option A: Uses OFDMA technology to achieve high concurrency.
Correct (True Statement).
OFDMA is a core feature of Wi-Fi 6 that improves concurrent communication.
Option B: Realizes zero latency, ensuring efficient service running.
Incorrect (False Statement).
Wi-Fi 6 reduces latency but cannot eliminate it entirely.
Option C: Provides high bandwidth, up to 9.6 Gbps.
Correct (True Statement).
Wi-Fi 6 supports a theoretical maximum bandwidth of 9.6 Gbps.
Option D: Uses TWT technology to reduce terminal power consumption.
Correct (True Statement).
TWT schedules communication times, allowing devices to enter low-power states and conserve battery life.
4. Summary:
Thefalsestatement isB, as Wi-Fi 6 does not achieve zero latency.
Reference:
Huawei HCIA-Datacom Study Guide, Chapter "Wi-Fi 6 Technology."
IEEE 802.11ax Standard Documentation.

After Layer 3 roaming, the STA's traffic is forwarded from the Foreign AP (FAP) to the Foreign AC (FAC), and then to the Home AC (HAC) before reaching the upper-layer network. This ensures that the STA remains on the same subnet without breaking existing sessions .

In the provided configuration, IS-IS is enabled onLoopback0but not onLoopback3of R2. As a result, R2 will advertise the route10.0.2.2/32(fromLoopback0) to R1 through IS-IS. However, the route10.0.2.3/32will not be advertised because IS-IS is not enabled on that loopback interface. Theimport-route directcommand does not override this behavior .

Comprehensive and Detailed Step-by-Step Explanation:
* BGP Router ID Selection Rules:
* If a router ID is not manually configured:
* The largest loopback address is selected as the router ID.
* If no loopback interfaces exist, the largest active physical interface address is selected.
* Default Behavior:
* This ensures that a stable and unique router ID is chosen automatically, even without manual configuration.
References:
* HCIA-Datacom Study Guide, Chapter: BGP Router ID
* Huawei Routing Device Configuration