[Dec 05, 2021] Latest HCIA-WLAN H12-311-ENU Actual Free Exam Questions
HCIA-WLAN H12-311-ENU Dumps Updated Practice Test and 261 unique questions
Huawei H12-311-ENU Exam Syllabus Topics:
| Topic | Details |
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| Topic 2 |
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| Topic 3 |
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NEW QUESTION 132
In the WDS network, the leaf API port root AP must use the same channel to successfully establish a link.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 133
If PoE is enabled on the switch, you can no longer access legacy devices on these interfaces.
- A. True
- B. False
Answer: B
NEW QUESTION 134
The algorithm used for CCMP encryption is .
- A. RC4
- B. Michael
- C. AES
- D. SMS4
Answer: C
NEW QUESTION 135
In WLAN, the AP has been working in a half-duplex state.
- A. True
- B. False
Answer: A
NEW QUESTION 136
For dBm, dB, dBi, the following description is correct (Select 3 Answers).
- A. If the antenna is 12dBi and the antenna is 14dBi, it can be said that A is smaller than 2D.
- B. dBm: characterizes the absolute value of power
- C. dBi and dBd: characterize the relative value of the gain
- D. dB: Characterizing the relative value of power
Answer: B,C,D
NEW QUESTION 137
In terms of PoE, AP belong to which?
- A. PD
- B. PSU
- C. PSE
- D. PI
Answer: A
NEW QUESTION 138
Which of the following are common sources of WLAN interference? (Multiple choice)
- A. Bluetooth transmission equipment
- B. Remote control
- C. Microwave oven
- D. Cordless phone
Answer: A,C,D
NEW QUESTION 139
Among the following options, it is not the main purpose of roaming.
- A. Avoid excessive authentication time during roaming, resulting in packet loss or even service interruption.
- B. Ensure user authorization information remains unchanged.
- C. Ensure that the user's network rate is unchanged.
- D. Ensure that the user's IP address is unchanged.
Answer: C
NEW QUESTION 140
In the term of PoE, what does the AP belong to?
- A. PSE
- B. PSU
- C. PD
- D. PI
Answer: A
NEW QUESTION 141
What are the processes for access WLAN users? (Multiple choice)
- A. Certified
- B. Scan to find surrounding wireless services
- C. Security check
- D. Linking
Answer: A,B,D
NEW QUESTION 142
Which of the following commands can be used to view the AP running system version? (Multiple Choice)
- A. display ap version all
- B. display ap all
- C. display ap update status all
- D. display ap run-info ap-id x (x is the ID number of the AP)
Answer: A,D
NEW QUESTION 143
If one AP of 802.11n support 2 * 2 MIMO technology, the theoretical rate of this AP is?
- A. 600 Mbps
- B. 300 Mbps
- C. 150 Mbps
- D. 450 Mbps
Answer: B
NEW QUESTION 144
Which modulation method does the following picture belong to?
- A. frequency modulation
- B. phase modulation
- C. amplitude modulation
- D. modulation
Answer: A
NEW QUESTION 145
On a WDS network, a root AP can connect to multiple leaf APs, but a leaf AP can connect to only one root AP.
- A. True
- B. False
Answer: A
NEW QUESTION 146
The Barker code is an 11-bit sequence (for example, 10110111000), which has advantages in wireless transmission, which can effectively reduce interference, but reduces efficiency.
- A. True
- B. False
Answer: A
NEW QUESTION 147
In the WLAN, ACK frame belongs to what type of frame?
- A. Control Frame
- B. empty data frame
- C. Data Frame
- D. management frames
Answer: A
NEW QUESTION 148
AP transmit power 20dBm, antenna gain 4dBi, cable and device loss 1dB, terminal receive antenna gain 2dBi, spatial propagation loss 80dB, terminal receive level RSSI=.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 149
Which of the following WLAN signals pass through (Select 2 Answers).
- A. Concrete wall
- B. Brick wall
- C. Glass window (colorless)
- D. Gypsum board
Answer: C,D
NEW QUESTION 150
Which of the following can be done to protect WLAN security? (Multiple choice)
- A. Control traffic
- B. Authentication
- C. Encryption
- D. System protection
Answer: B,C,D
NEW QUESTION 151
In WLAN, the AP has been always working in a half-duplex state.
- A. True
- B. False
Answer: A
NEW QUESTION 152
The correct statement about WDS is (Select 2 Answers)?
- A. WDS uses the 2.4GHz band as the bridge frequency band by default.
- B. Huawei indoor AP does not support WDS function.
- C. Scalability is good, and there is no need to lay new wired connections and deploy more APs
- D. Connect two separate LAN segments through a wireless bridge and provide data transmission between them
Answer: C,D
NEW QUESTION 153
What is the Chinese name of SSID?
- A. Extended service set
- B. Basic service area
- C. Basic service set
- D. Service set identifier
Answer: D
NEW QUESTION 154
WEP encryption' data algorithm using which algorithm?
- A. CCMP
- B. RC4
- C. AES
- D. asymmetric encryption
Answer: B
NEW QUESTION 155
Which two kinds of Basic Service Set are included in BSS? (Multiple Choice)
- A. Extension Structure Pattern Basic Service Set
- B. Extend Basic Service Set
- C. Infrastructure Structure Pattern Basic Service Set
- D. Independent Basic Service Set
Answer: C,D
NEW QUESTION 156
Regarding the working principle of 5G priority, the following statement is correct.
- A. 5G priority requires all clients to support both 2.4GHz and 5GHz bands
- B. 5G priority requires the AP to work normally when it is a dual-band AP.
- C. 5G priority is turned on, the network transfer speed of the client supporting only 2.4G will be slower.
- D. 5G priority feature is to let the 5G client send data preferentially.
Answer: B
NEW QUESTION 157
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