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

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Viewing questions 21-30 out of questions

Questions # 21:

Free mobility is a solution that ensures a user obtains the same network access policy regardless of the user location and IP address. On iMaster NCE-Campus, administrators can divide network-wide users and resources into different security groups and resource groups from different dimensions. Which of the following statements are true about security groups and resource groups?

Options:

For resource groups, a policy is generated on the enforcement point for each resource group instead of for each IP address.

The priority of dynamically authorized members in a security group is lower than that of statically bound members.

IP address sets cannot overlap between security groups, but can overlap between resource groups.

Security groups and resource groups can be imported and exported in batches using an Excel template.

Security group members can be configured by statically binding IP addresses or dynamically delivered through Huawei proprietary RADIUS attributes.

Answer

A, D

Questions # 22:

Which of the following statements are true about directional and omnidirectional antennas?

Options:

Omnidirectional antennas are preferred to directional antennas.

If a long coverage distance is required, omnidirectional antennas are preferred,

Omnidirectional antennas are easier to plan than directional antennas.

Directional antennas are more suitable for signal coverage in a pedestrian street.

Answer

C, D

Questions # 23:

Match the following common WLAN issues with the correct optimization suggestions.

Question # 23

Options:

Answer

Answer:

Questions # 24:

802. 11r fast roaming (over-the-air) is enabled on the WLAN shown in the figure. A STA roams from AP1 to AP2. Sort the steps in chronological order during the 802.11r fast roaming process between WACs.

Question # 24

Options:

Answer

Answer:

Explanation

According to the Huawei documents and resources, the chronological order during the 802.11r fast roaming process between WACs is as follows:

2.The STA accesses the network through API. This is the initial association process before roaming.

1.The STA initiates an 802.11 FT authentication request to AP2. This is the first step of the roaming process when the STA moves to a new AP.

3.AP2 starts the reassociation timer, and sends an 802.11 FT authentication response to the STA. This is the second step of the roaming process when AP2 responds to the STA’s request and sets a timer for reassociation.

4.The STA generates and installs a P TK based on the information contained in the response frame. This is the third step of the roaming process when the STA derives a new pairwise key for encryption.

5.The STA sends a reassociation request to AP2. This is the fourth step of the roaming process when the STA requests to reassociate with AP2.

6.AP2 generates and installs a PTK according to PMK-RI and information contained in the request frame. This is the fifth step of the roaming process when AP2 derives the same pairwise key as the STA.

7.After receiving the reassociation request, AP2 disables the reassociation timer, and then sends a reassociation reg onse to the STA. This is the sixth step of the roaming process when AP2 confirms the reassociation with the STA and stops the timer.

8.The STA receives the response frame of AP2. The roaming process is complete. This is the final step of the roaming process when the STA completes the handover to AP2.

Therefore, 2, 1, 3, 4, 5, 6, 7, 8 is the correct answer. References: https://support.huawei.com/enterprise/en/doc/EDOC1100169459/8d79210e/configuring-wireless-mesh-networking

Questions # 25:

Which of the following may be the reason why no data Is displayed on the telemetry management page of IMaster NCE-CampusInsight? (Select All that Apply)

Options:

The network connecting devices and iMaster NCE-Campuslnsight Is faulty.

Telemetry data reporting is not configured on devices according to the configuration guide.

No license file is imported.

Devices are not added to iMaster NCE-Campuslnsight.

The UTC time of devices is inconsistent with that of iMaster NCE-Campuslnsight.

Answer

A, B, D

Explanation

C is false because the license file only affects the number of devices that can be managed by iMaster NCE-CampusInsight, not the data display.

E is false because the UTC time of devices does not need to be consistent with that of iMaster NCE-CampusInsight.

[References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/data-display, , , ]

Questions # 26:

Satellite positioning can achieve high positioning accuracy in both indoor and outdoor scenarios.

Options:

True

False

Answer

Explanation

Satellite positioning can achieve high positioning accuracy in outdoor scenarios, but not in indoor scenarios. This is because satellite signals are easily blocked or interfered by buildings, walls, ceilings, and other obstacles in indoor environments.

[References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/satellite-positioning, , , ]

Questions # 27:

Drag the short-range wireless IoT technologies on the left to their corresponding descriptions on the right.

Question # 27

Options:

Answer

Answer:

Explanation

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

Questions # 28:

After multicast-to-unicast conversion is enabled on an AP ' s air interface, which of the followings is the destination MAC address of multicast packets sent over the air interface?

Options:

Multicast MAC address

MAC address of the multicast source

Broadcast MAC address

MAC address of a STA

Answer

Explanation

After multicast-to-unicast conversion is enabled on an AP’s air interface, the destination MAC address of multicast packets sent over the air interface is changed to the MAC address of a STA that has joined the multicast group. This improves the transmission efficiency and reliability of multicast packets.

[References: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/multicast-to-unicast-conversion, , , ]

Questions # 29:

After the HTTP domain name is entered in a browser, the user Is not redirected to the Portal URL. Which of the followings is the possible cause for this failure? (Select All that Apply)

Options:

The DNS server IP address is not added to the authentication-free rule.

The URL template is incorrectly configured.

HTTPS redirection is disabled.

The web server is incorrectly configured.

Answer

A, B, D

Explanation

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, , , ]

Questions # 30:

Sticky STAs stick to the initially associated APs. Even if the STAs are far away from the currently associated AP, have weak signals, or have low rates, they will not roam to neighboring APs with better signals.