Huawei H12-351_V1.0 Exam Practice Test Instant Access

Question 1

Which of the following configurations may cause ST As to experience a slow Internet connection? (Select All that Apply)

AQoS CAR is configured in the traffic profile.

BRadio 1 of APs is disabled.

CTKIP encryption is configured, causing a low link setup rate.

DRate limiting is configured in the SSID profile.

Answer : A, C, D

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

Question 2

An AP may preferentially use the BTM mode to steer some STAs. With which of the following protocols are such STAs compliant?

A802.11k

B802.11i

C802.11r

D802.11v

Answer : D

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.

Question 3

Which of the following advantages does BSS coloring provide in Wi-Fi 6? (Select All that Apply)

AHigher packet rate on the air interface

BEnhanced encryption on the air interface

CMore efficient channel use

DHigher concurrency in high-density scenarios

Answer : A, C, D

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.

Question 4

As shown in the figure, STA_1 through STA_4 are associated with AP_1, and STA_5 is associated with AP_2. Assuming that the load balancing threshold is 2, the load difference threshold is 25%, and API and AP2 support a maximum of 10 STAs, which of the following statements are true? (Select All that Apply)

AThe load percentage of AP_1 is 40%, and that of AP_2 is 10%.

BThe load balancing mechanism needs to be enabled. Then some STAs are steered from AP_1 to AP__2.

CIf load balancing is performed, the load percentage of AP_1 changes to 30%.

DThe minimum load percentage is 10%, which is greater than the load difference threshold. Therefore, load balancing needs to be enabled.

Answer : A, B

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.

Question 5

Which of the following key factors is used by the CloudCampus cloud management platform to determine the tenant to which a device belongs?

ADevice ESN

BDevice IP address

CDevice MAC address

DDevice model

Answer : A

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.

Question 6

In a VRRP HSB scenario, if the VRRP preemption delay is set to a small value, which of the following problems may occur after a master/backup switchover? (Select All that apply)

AThe batch backup process cannot be started.

BA master/backup switchback is triggered too quickly.

CBackup information is incomplete.

DService data on the master and backup WACs is lost.

Answer : B, C

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. Reference:1: https://support.huawei.com/enterprise/en/doc/EDOC1100064368/80fc2ebd/example-for-configuring-vrrp-hsb2: https://support.huawei.com/enterprise/en/doc/EDOC1100096325/1a753937/vrrp-hsb-configuration

Question 7

In a multicast solution, there must be reachable unlcast routes between multicast sources and receivers.

ATrue

BFalse

Answer : A

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.

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