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

According to the Huawei documents and resources, the HLD phase is the high-level design phase of a WLAN project. It involves the following items:

• Capacity planning: Determines the number and types of devices required for the WLAN network based on the customer’s requirements and network scale.
• Network design: Designs the network topology, IP addressing scheme, VLAN division, security policies, and other network parameters for the WLAN network.
• Deployment planning: Plans the deployment sequence, schedule, resources, and risks for the WLAN project.

AP position planning is not involved in the HLD phase. It is part of the LLD phase, which is the low-level design phase of a WLAN project. It involves the detailed design of AP positions, antenna types, channel allocation, power adjustment, and other wireless parameters for the WLAN network. Therefore, C is the correct answer. References: : https://support.huawei.com/enterprise/en/doc/EDOC1100158948/9a0d5c37/wlan-project-design

B and E are not parameters recorded by iMaster NCE-CampusInsight for interference analysis. The other options are parameters recorded by iMaster NCE-CampusInsight to comprehensively record and analyze interference.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/interference-analysis

BSS coloring is a feature introduced in Wi-Fi 6 that assigns different colors to different BSSs to reduce co-channel interference. BSS coloring provides the following advantages:

• Higher packet rate on the air interface: BSS coloring reduces collisions between packets from different BSSs on the same channel, improving packet transmission efficiency.
• More efficient channel use: BSS coloring allows spatial reuse of channels by different BSSs, increasing channel utilization.
• Higher concurrency in high-density scenarios: BSS coloring reduces interference among neighboring APs and improves network performance in high-density scenarios.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/bss-coloring

• MP: Mesh node that uses IEEE 802.11 MAC and PHY protocols for wireless communication. This node supports automatic topology discovery, automatic route discovery, and data packet forwarding. It can provide both mesh service and user access service1.
• MPP: MP node that connects a WMN to MPs on other types of networks. This node can function as a portal for communication between internal mesh nodes and external networks1.
• Neighbor MP: Neighboring MP with which an MP prepares to establish a mesh link1.
• Candidate MP: AP that directly communicates with a mesh node2.

https://support.huawei.com/enterprise/en/doc/EDOC1100064365/90f2391e/configuration-examples-for-mesh  2: https://support.huawei.com/enterprise/en/doc/EDOC1100169459/8d79210e/configuring-wireless-mesh-networking

An AP may preferentially use the BTM mode to steer some STAs that are compliant with 802.11v protocol. BTM stands for BSS Transition Management, which is a feature defined in 802.11v protocol that allows an AP to send a request to a STA to switch to another BSS.

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

In a dual-link backup scenario, when the active link recovers, the AP waits for 15 Echo intervals before switching back to the original primary WAC. This prevents frequent link switchovers caused by unstable links.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/dual-link-backup

The WPA3 transition mode applies to both WPA3-Enterprise and WPA3-Personal. In this mode, WPA3 and WPA2 can coexist for a period of time in the future to enable WPA3-incapable STAs to access a WPA3-configured network.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/wpa3-transition-mode

According to the Huawei documents and resources, the network planning suggestions for the solutions are as follows:

• Asset management: The RFID signal coverage distance is 25 m. Therefore, RFID signal coverage must be considered during AP deployment planning. Attach RFID tags on the surface or top of assets to prevent signals from being blocked.
• ESL: Shelves may be blocked in application scenarios. Therefore, shelf blocking must be considered during network planning. The shelves can be deployed in aisles to minimize obstacles toward integrated base stations.
• Smart healthcare: For applications that support regional positioning, positioning devices need to be deployed at key entrances and exits based on service requirements.

Therefore, Asset management - 2, ESL - 1, Smart healthcare - 3 is the correct answer. References: : https://support.huawei.com/enterprise/en/doc/EDOC1100158948/9a0d5c37/asset-management : https://support.huawei.com/enterprise/en/doc/EDOC1100158948/9a0d5c37/esl : https://support.huawei.com/enterprise/en/doc/EDOC1100158948/9a0d5c37/smart-healthcare

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

When calculating the number of APs, you cannot simply divide the total required bandwidth by the maximum bandwidth of a single AP. You also need to consider other factors such as signal coverage area, user density, interference level, and application type.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/calculation-of-the-number-of-aps

The device ESN (Electronic Serial Number) is a unique identifier that is used by the CloudCampus cloud management platform to determine the tenant to which a device belongs. The device ESN is bound to a tenant when a device is added to the platform.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/device-esn

• A. In EAP termination mode, an access device encapsulates EAP packets sent by an 802. IX client Into RADIUS packets, without processing the data in the EAP packets. This statement is false because in EAP termination mode, an access device extracts information from EAP packets, encapsulates the information into RADIUS packets, and sends the RADIUS packets to an authentication server2.
• D. The EAP termination mode simplifies the processing on an access device and supports various authentication methods. However, this mode requires an authentication server to support EAP and have high processing capability. This statement is false because it describes the EAP relay mode, not the EAP termination mode2.

Therefore, A and D are the correct answers. References: 2: https://support.huawei.com/enterprise/en/doc/EDOC1100086527