Huawei H12-311-ENU Actual Free Exam Questions & Community Discussion

Exam Code/Number: H12-311-ENU
Exam Name/Title: Huawei Certified ICT Associate-Wireless Local Area Network
Certification Provider: Huawei
Corresponding Certification: HCIA-WLAN

Exam Questions: 300
Updated On: Jul 29, 2026

Question #1

The following statement about antenna classification is correct (Select 2 Answers)?

A. Classification by working frequency band: communication antenna, TV antenna, radar antenna, etc.

B. Classification by shape: wire antenna, planar antenna, etc.

C. Classification by use: short wave antenna, ultrashort wave antenna, microwave antenna, etc.

D. Classification by direction: omnidirectional antenna, directional antenna, etc.

Discussion 0

Correct Answer: B,D Vote an answer

Question #2

In an 802.11 frame, the terminal needs to obtain access rights to the wireless medium, and what kind of control message is to be sent?

A. RTS

B. PS-Poll

C. ACK

D. CTS

Discussion 0

Correct Answer: A Vote an answer

Question #3

Which of the following can be done to protect WLAN security (Select 3 Answers)?

A. Control traffic

B. Authentication

C. System protection

D. Encryption

Discussion 0

Correct Answer: B,C,D Vote an answer

Question #4

For lobe width, the following description is correct (Select 3 Answers).

A. The terminal can receive the signal only within the half power angle coverage.

B. The narrower the lobes, the better the directionality, the farther the radiation distance, the stronger the anti-interference ability

C. In the main lobe range, the power density decreases by half (3dB) relative to the maximum radiation direction.

D. The pattern usually has two or more petals

Discussion 0

Correct Answer: B,C,D Vote an answer

Question #5

Among the following obstacles, has the greatest loss of wireless signals.

A. Glass

B. 120mm Brick wall

C. Gypsum ceiling

D. 200mm Concrete wall

Discussion 0

Correct Answer: D Vote an answer

Question #6

The conditions for switching triggers are generally set (Select 2 Answers).

A. Start the switch after the STA reaches a certain distance from the original AP.

B. Start the switch when the network speed is very slow when it is associated with the original AP.

C. Set the signal strength ratio between the current AP and the neighbor AP, and switch to the threshold.

D. Check the packet loss rate and start switching when the packet loss rate reaches a certain value.

Discussion 0

Correct Answer: C,D Vote an answer

Question #7

What type of frame does the ACK frame belong to in the WLAN?

A. Management frame

B. Control frame

C. Data frame

D. Empty data frame

Discussion 0

Correct Answer: B Vote an answer

Question #8

Which of the following are related parameters of the Traffic template (Select 2 Answers).

A. CAC Policy

B. 802.3 Priority Mapping Policy

C. ACK strategy

D. Tunnel priority mapping strategy

Discussion 0

Correct Answer: B,D Vote an answer

Question #9

IEEE is the standard organization responsible for the use of wireless frequencies in the United States.

A. True

B. False

Discussion 0

Correct Answer: B Vote an answer

Question #10

In the 802.11 frame, when the network uses the WDS model for signal transmission, what are the values of To DS and From DS, respectively?

A. 0,0

B. 0,1

C. 1,0

D. 1,1

Discussion 0

Correct Answer: A Vote an answer

Question #11

The Int-Serv model provides users with end-to-end absolute QoS guarantees, but the reason for the lack of successful large-scale commercial use is.

A. Limited bandwidth reservation

B. Poor scalability

C. Low forwarding efficiency

D. Not conducive to traffic regulation

Discussion 0

Correct Answer: B Vote an answer

Question #12

802.11b is a protocol based on Orthogonal Frequency Division Multiplexing (OFDM) technology.

A. True

B. False

Discussion 0

Correct Answer: B Vote an answer

Question #13

Which of the following options will cause users to not find a wireless network signal (Select 2 Answers)?

A. The wireless controller is configured with user isolation

B. User wireless network card driver is abnormal

C. The user wireless network card is not enabled or the wireless network card hardware switch is not turned on.

D. AP is configured with 5G priority, resulting in 2.4G wireless client not searching for signals.

Discussion 0

Correct Answer: B,C Vote an answer

Question #14

According to the following configuration example, the following statement is correct.
[AC] dhcp enable [AC] interface VLANif100
[AC-VLANif100] ip address 10.1.100.1 24
[AC-VLANif100] dhcp select interface
[AC-VLANif100] quit

A. The DHCP service is enabled by default in the global mode, so the dhcp enable can be configured. The

B. If VLAN 100 is the management VLAN where the AP is located, the option 43 field in the DHCP message received by the AP should be 10.1.100.1.

C. If VLAN 100 is a user VLAN, the gateway is 10.1.100.1 and the mask is 255.255.255.0 after the user receives the address.

D. dhcp select interface command enables the DHCP client function on the interface of VLAN 100.

Discussion 0

Correct Answer: C Vote an answer

Question #15

What are the main contents of the CAPWAP protocol (Select 3 Answers)?

A. AP automatic discovery of AC and state machine operation and maintenance of AP&AC

B. STA data encapsulates CAPWAP tunnel for forwarding

C. Define the transfer rate of the Mac layer and the physical layer

D. The AC manages the AP and delivers the service configuration.

Discussion 0

Correct Answer: A,B,D Vote an answer

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