H12-351_V1.0 Sample Questions 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

C is false because HTTPS redirection is not required for Portal authentication to work properly.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/troubleshooting-portal-authentication-failures

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

Radio calibration is applicable to high-density scenarios where a large number of users access the network simultaneously and require high bandwidth, such as stadiums, exhibition halls, and conference centers. Radio calibration can improve user experience by increasing the frequency bandwidth for high-load APs.

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

B is false because calculated data can be displayed on iMaster NCE-CampusInsight without loading a license on the device management page. The license only affects the number of devices that can be managed by iMaster NCE-CampusInsight.

D is false because the UTC time of iMaster NCE-CampusInsight does not need to be the same as that of its managed devices. However, it is recommended that they use the same time zone to avoid confusion.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/data-collection

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

 IPsec uses authentication headers (AHs) and encapsulating security payloads (ESPs) to ensure secure transmission of service data on the network. AHs provide authentication and integrity verification for the sender and the receiver, while ESPs provide encryption and optional authentication for the data.

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

Fingerprint-based positioning technology is a method that uses the signal strength or phase difference of wireless signals to locate objects. There are two types of fingerprint-based positioning technology: virtual fingerprint-based positioning and real fingerprint-based positioning. In virtual fingerprint-based positioning, the positioning engine generates a virtual fingerprint library through calculations based on the AP deployment and environment information. In real fingerprint-based positioning, the fingerprint map is obtained through onsite information collection.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/fingerprint-based-positioning-technology

According to the Huawei documents and resources, EAP termination and EAP relay are typical 802.1X authentication modes between the access device and authentication server. In EAP termination mode, the access device terminates EAP packets and encapsulates them into RADIUS packets. In EAP relay mode, the access device directly encapsulates the received EAP packets into RADIUS using EAP over RADIUS (EAPoR) packets2. Therefore, A and B are the correct answers. References: 2: https://support.huawei.com/enterprise/en/doc/EDOC1100086527

iMaster NCE-CampusInsight analyzes network issues during correlation analysis of poor-QoE clients, including coverage, interference, throughput, and hardware issues. It also provides suggestions for network optimization based on the analysis results.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/correlation-analysis-of-poor-qoe-clients

According to the Huawei documents and resources, the definitions of the short-range wireless IoT technologies are as follows:

• ZigBee: IEEE 802.15.4-based wireless communication technology is a short-range, and low-power wireless communication technology that supports star, mesh, and hybrid networking.
• Bluetooth: With the emergence of IoT industries such as smart wearables, smart home, and Internet of Vehicles, short-range communication technologies are attracting more and more developers.
• REID: Its basic principle is to automatically identify objects based on the transmission characteristics of radio signals and space coupling (inductance or electromagnetic coupling) or radar reflection.
• Wi-Fi: Wireless networking technology based on IEEE 802.11 is the most popular WLAN technology.

Therefore, ZigBee - 1, Bluetooth - 3, REID - 2, Wi-Fi - 4 is the correct answer. References: : https://support.huawei.com/enterprise/en/doc/EDOC1100158948/9a0d5c37/zigbee : https://support.huawei.com/enterprise/en/doc/EDOC1100158948/9a0d5c37/bluetooth : https://support.huawei.com/enterprise/en/doc/EDOC1100158948/9a0d5c37/rfid : https://support.huawei.com/enterprise/en/doc/EDOC1100158948/9a0d5c37/wi-fi

• 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

Huawei APs can identify non-Wi-Fi devices that operate in the 2.4 GHz frequency band, such as Bluetooth devices, ZigBee devices, game controllers, wireless video and audio transmitters, microwave ovens, cordless phones, and baby monitors.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/non-wi-fi-device-identification

A mesh connection can be torn down by either of the two APs that have established it by sending a Mesh Peering Close frame to the other AP. This frame indicates that the sender no longer wants to maintain the mesh connection.

References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/mesh-networking

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