H12-351_V1.0 HCIE-WLAN (Written) V1.0 Questions and Answers

In Huawei’s smart roaming solution, the WAC can discover and maintain neighboring AP entries of STAs by using two methods: passive listening and active scanning. Passive listening means that the AP listens to the Probe frames sent by STAs and reports them to the WAC. Active scanning means that the AP periodically and proactively scans neighboring APs of STAs and reports them to the WAC.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/smart-roaming

According to the Huawei documents and resources, the features and application scenarios of the wireless positioning solutions are as follows:

• Wi-Fi terminal positioning: Performs network-side positioning generally based on the RSSI, but provides low positioning accuracy. This method applies to scenarios such as precision marketing and customer flow analysis in shopping malls.
• Bluetooth tag positioning: Runs based on the built-in Bluetooth module of an AP. The AP reports data to a positioning engine for location resolution. This positioning technology provides low positioning accuracy and applies to asset positioning and personnel positioning scenarios.
• UWB positioning: Provides high positioning accuracy, and is applicable to scenarios that require high accuracy, such as intelligent manufacturing, warehousing logistics, and mechanical manufacturing.
• Bluetooth terminal positioning: Runs based on the built-in Bluetooth module of an AP, which can be implemented on either the network side or terminal side.

Therefore, Wi-Fi terminal positioning - 3, Bluetooth tag positioning - 4, UWB positioning - 2, Bluetooth terminal positioning - 1 is the correct answer. References: : https://support.huawei.com/enterprise/en/doc/EDOC1100158948/9a0d5c37/wi-fi-terminal-positioning : https://support.huawei.com/enterprise/en/doc/EDOC1100158948/9a0d5c37/bluetooth-tag-positioning : https://support.huawei.com/enterprise/en/doc/EDOC1100158948/9a0d5c37/uwb-positioning : https://support.huawei.com/enterprise/en/doc/EDOC1100158948/9a0d5c37/bluetooth-terminal-positioning

The display sync-configuration compare command is used to check whether the public configurations on two WACs are consistent after wireless configuration synchronization. The command output shows the differences between the configurations on the master and backup WACs. In this case, the configuration of vap-profile name 3 exists on the master WAC but not on the backup WAC.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/display-sync-configuration-compare

The load percentage of an AP is calculated by dividing the number of associated STAs by the maximum number of STAs supported by the AP. In this case, the load percentage of AP_1 is 4/10 = 40%, and that of AP_2 is 1/10 = 10%. The load balancing mechanism needs to be enabled to balance the load between AP_1 and AP_2. Then some STAs are steered from AP_1 to AP_2 based on the load balancing threshold and the load difference threshold.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/load-balancing

 In a multicast solution, there must be reachable unicast routes between multicast sources and receivers, because multicast routing protocols use unicast routing information to build multicast forwarding trees.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/multicast

B is false because a static VXLAN tunnel does not use any protocols on the control plane, saving device resources.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/static-vxlan-tunnel