Easy To Download Huawei H12-311-ENU Exam Dumps Updated 300 Questions
New Updated H12-311-ENU Exam Questions 2022
NEW QUESTION 169
For outdoor WLAN coverage scenarios, which of the following descriptions is correct?
- A. The feeder interface must match the selected antenna
- B. Outdoor antennas should not blindly pursue high gain
- C. The higher the antenna gain, the stronger the antenna directivity and the weaker the radiation gain directly below the antenna
- D. The length of the feeder must not exceed 2 meters
Answer: D
NEW QUESTION 170
The antenna obtains the gain by means of .
- A. Using a power amplifier in the antenna system
- B. Use low standing wave ratio equipment
- C. Making the antenna radiation more concentrated
- D. Use high efficiency antenna feeder
Answer: C
NEW QUESTION 171
What is the parameter used in the 802.11 frame to check the integrity of the received frame?
- A. Frame Control
- B. FCS
- C. Sequence control bits
- D. Duration
Answer: B
NEW QUESTION 172
How many channels can the 2.4 GHz band be divided into?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 173
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 174
Which of the following wireless technologies work in the 5 GHz band? (Multiple choice)
- A. Digital satellite
- B. Bluetooth
- C. Radar
- D. Infrared
Answer: A,C
NEW QUESTION 175
Which of the following statement are correct about the classification of the antenna?
(Multiple choice)
- A. according to use classification: shortwave antenna, ultra-short wave antenna and microwave antenna, etc
- B. according to the classification of direction: omni-directional antenna, directional antenna, etc
- C. according to the working frequency band classification: communication antenna, TV antenna, radar antenna, etc
- D. according to the shape classification: linear antenna, planar antenna, etc
Answer: B,D
NEW QUESTION 176
AP can provide power and data transmission through the POE switcher.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 177
WEP encrypted data algorithms use algorithms.
- A. AES
- B. CCMP
- C. RC4
- D. Asymmetric encryption
Answer: C
NEW QUESTION 178
According to the following output, the following statement is correct (Select 2 Answers).
<Quidway> display device
AC6605-26-PWR's Device status:
Slot Sub Type Online Power Register Status Role
0 - AC6605-26 Present PowerOn Registered Normal Master
POWER Present PowerOn Registered Normal NA
- A. According to the output, the AC6605 adopts the POE power supply module.
- B. To achieve the relevant configuration of the WLAN, the user must first switch to the wireless side through CTRL+Y.
- C. The user is currently on the wireless side of the AC.
- D. Currently the user is on the wired side of the AC.
Answer: B,D
NEW QUESTION 179
Each AC device needs to specify the source IP address of the AC to establish a CAPWAP tunnel with the AP. One AC can specify up to two WLAN source IP addresses.
- A. True
- B. False
Answer: B
NEW QUESTION 180
Regarding the two major standards of PoE, the following statement is incorrect (Select 2 Answers).
The
- A. 802.at supports four power levels and only supports Category 5 lines.
- B. 802.at, also known as PoE+, is compatible with 802.af devices.
- C. 802.af, also known as PoE+, is compatible with 802.at devices.
- D. 802.af standard was established in 2009, and the maximum output power is 30W.
Answer: C,D
NEW QUESTION 181
An infrastructure-mode network consisting of multiple APs and distributed systems that connect them, also known as what?
- A. Basic service set
- B. Extended service area
- C. Basic service area
- D. Extended service set
Answer: D
NEW QUESTION 182
Which algorithm is used for CCMP encryption?
- A. RC4
- B. AES
- C. Michael
- D. SMS4
Answer: B
NEW QUESTION 183
Which of the following options does belong to the EDCA parameters? (Multiple Choice)
- A. SIFS
- B. TXOPLimit
- C. DIFS
- D. AIFSN
Answer: B,D
NEW QUESTION 184
According to the AP naming rules, which of the following statement about "AP4030DN" is incorrect?
- A. "N" in the AP4030DN means that the AP is an 802.11n AP.
- B. "3" in AP4030DN, which means that the AP supports 3*3MIMO.
- C. "D" in AP4030DN means that the AP is a dual-band AP and supports the 2.4GHz and 5GHz bands at the same time.
- D. The first "0" in the AP4030DN represents the AP as an internal antenna.
Answer: A
NEW QUESTION 185
There are four wireless STA. Which workstation occupy the channel preferentially according to the following backoff time parameters?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 186
Regarding the AP6610DN, the following statement is wrong.
- A. AP6610DN is a dual-band AP, in which the 5GHz band can be used for both wireless bridging and user access.
- B. AP66010DN supports both Ethernet interface and fiber interface.
- C. AP6610DN is an enhanced outdoor AP
- D. AP6610 only has one Ethernet interface, the maximum bandwidth is 1000M
Answer: D
NEW QUESTION 187
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