Huawei H12-351_V1.0 HCIE-WLAN (Written) V1.0 Exam Practice Test

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 VRRP preemption delay is the time that an AC waits before preempting another AC with a lower priority. If the VRRP preemption delay is set to a small value, the following problems may occur after a master/backup switchover:

• B. A master/backup switchback is triggered too quickly. If the master AC recovers soon after a switchover, it may preempt the backup AC again and become the master AC. This may cause frequent switchovers and affect network stability1.
• C. Backup information is incomplete. If the backup AC takes over services from the master AC too quickly, it may not have received all the data synchronized from the master AC through HSB. This may cause service interruption or data loss2.

Therefore, B and C are the correct answers. References: 1: https://support.huawei.com/enterprise/en/doc/EDOC1100064368/80fc2ebd/example-for-configuring-vrrp-hsb  2: https://support.huawei.com/enterprise/en/doc/EDOC1100096325/1a753937/vrrp-hsb-configuration

C is not a tool commonly used for WLAN network planning, acceptance, or health evaluation. eDesk is a tool for remote fault diagnosis and rectification on WLAN networks.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/wlan-planner https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/imaster-nce-campusinsight https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/cloudcampus-app

B is false because disabling radio 1 of APs does not affect the Internet connection speed of STAs that use radio 2.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/troubleshooting-slow-internet-connection

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

iMaster NCE-CampusInsight provides intelligent radio calibration for high-load APs to increase the frequency bandwidth. However, this function applies only to the 5 GHz frequency band, not to the 2.4 GHz frequency band.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/intelligent-radio-calibration

The home agent is a device that communicates with the gateway on the STAs’ home network at Layer 3 and maintains the binding entries of STAs’ home addresses and care-of addresses. A home WAC can function as a home agent of STAs, while a home AP cannot.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/mobile-ip

According to the Huawei documents and resources, Huawei Agile Cloud Authentication (HACA) supports iMaster NCE-Campus as well as Agile Controller-Campus as the HACA server. HACA is an authentication method that allows users to access a network without entering user names or passwords3. Therefore, B is the correct answer. References: 3: https://support.huawei.com/enterprise/en/doc/EDOC1100086527