Huawei HCIA-WLAN H12-311 Questions & Answers

• Question 41:

  For dBm, dB, dBi, the following description is correct (Select 3 Answers).

  A. dBm: characterizes the absolute value of power

  B. dBi and dBd: characterize the relative value of the gain

  C. dB: Characterizing the relative value of power

  D. If the antenna is 12dBi and the antenna is 14dBi, it can be said that A is smaller than 2D.

  Correct Answer: ABC

• Question 42:

  The gain of antenna A is 11dBi, and the gain of antenna B is 8dBi. It can be said that antenna A has a larger gain than antenna B.

  A. 3dB

  B. 3dBi

  C. 3dBd

  D. Uncertain

  Correct Answer: A

• Question 43:

  20dBm is equivalent to mW.

  A. 100

  B. 200

  C. 500

  D. 1000

  Correct Answer: A

• Question 44:

  The antenna obtains the gain by means of .

  A. Using a power amplifier in the antenna system

  B. Making the antenna radiation more concentrated

  C. Use high efficiency antenna feeder

  D. Use low standing wave ratio equipment

  Correct Answer: B

• Question 45:

  If the AP's transmit power is 1mW, it is converted to dBm and then dBm.

  A. 20

  B. 1

  C. 0

  D. 10

  Correct Answer: C

• Question 46:

  A 10-story building needs to cover the WLAN signal, because considering the floor blocking, the signal frequency of the 5th and 6th WLANs can be set to 6 channels at the same time.

  A. True

  B. False

  Correct Answer: B

• Question 47:

  When deploying APs on multiple floors of a building, the factor to be aware of is (Select 3 Answers).

  A. Material of the wall

  B. Other interference signals

  C. In order not to affect the appearance, the AP should be hidden in the ceiling

  D. Unified planning channel

  Correct Answer: ABD

• Question 48:

  The indicator used to describe the extent to which the antenna converges on the transmit power is.

  A. Broadband

  B. Power

  C. Gain

  D. Polarity

  Correct Answer: C

• Question 49:

  For outdoor WLAN coverage, the following statement is correct (Select 3 Answers).

  A. The higher the antenna gain, the stronger the antenna directivity and the weaker the radiation gain directly below the antenna.

  B. The feeder interface must match the selected antenna

  C. The length of the feeder must not exceed 2 meters.

  D. Outdoor antennas should not blindly pursue high gain

  Correct Answer: ABD

• Question 50:

  Which of the following are factors that need to be considered for AP capacity planning (Select 3 Answers)

  A. Equipment performance

  B. Number of concurrent users

  C. Bandwidth requirements

  D. Power supply type

  Correct Answer: ABD