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NEW QUESTION 173
There are four wireless STA, According to the following backoff time parameters, which workstation has the priority to occupy the channel?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 174
802.11 In the frame, STA Which type of frame () does the association request and authentication request belong to?
- A. Data frame, control frame, management frame have this function
- B. Control frame
- C. Data Frame
- D. Management frame
Answer: D
NEW QUESTION 175
thin AP Find AC In the process, the first step is AP Check if there is pre-configured static AC of IP List.
- A. True
- B. False
Answer: A
NEW QUESTION 176
1999 Year, IEEE 802.11a The standard formulation is completed. The standard stipulates that the working frequency band of wireless local area network can reach the transmission rate 11Mbps .
5.15 ~5.825GHz , Data transmission
- A. True
- B. False
Answer: B
NEW QUESTION 177
When coverage area 2.4GHz Frequency band 1 When channel interference is large and severe, adjust the device to 3 Channel, can effectively reduce interference.
- A. True
- B. False
Answer: B
NEW QUESTION 178
Which modulation method is the picture below ()?
- A. AM
- B. FM
- C. phase modulation
- D. Wave modulation
Answer: B
NEW QUESTION 179
if AP Work in infrastructure mode, then AP The working state at this time is full-duplex mode.
- A. True
- B. False
Answer: B
NEW QUESTION 180
For shared key authentication, the error described below is ().
- A. For skinny AP, The shared key is preset in AC middle
- B. The shared secret requires users and AP Use the same shared secret
- C. After adopting shared key authentication, you must use WEP Encryption
- D. The disadvantages of shared keys are poor scalability and not very secure
Answer: A
NEW QUESTION 181
Which of the following statements is correct ()?
(Select 2 Answers)
- A. WPA2 uses 802.1X authentication
- B. When the user performs web authentication, it is triggered by the user's http message before the IP address is successfully obtained; at this time, it is forcibly redirected to the portal server, Go through the certification process
- C. WPA only supports TKIP, an encryption technology
- D. When the user performs web authentication, it is triggered by the user's http message after successfully obtaining the IP address; at this time, it is forcibly redirected to the portal server, Go through the certification process
Answer: A,D
NEW QUESTION 182
MIMO(Multiple input and multiple output) The client can use at most 3 Two spatial streams transmit data at the same time, and the maximum theoretical rate can reach , That is, multiple input and multiple output, using 600Mbps . 802.11n Technology wireless access point and guest
- A. True
- B. False
Answer: B
NEW QUESTION 183
Among the following priority queues, the () queue has the highest default priority.
- A. AC-VI
- B. AC-VO
- C. AC-BK
- D. AC-BE
Answer: B
NEW QUESTION 184
In theory, the network cable used in the project cannot exceed ()rice.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 185
AP Domain AP The deployment type does not include ().
- A. Discrete deployment
- B. Ordinary deployment
- C. Densely deployed
- D. Orderly deployment
Answer: D
NEW QUESTION 186
In huawei eSight The maximum number of layers supported by the location topology in the network management system is layer ().
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 187
antenna A The gain is 11dBi ,antenna B The gain is 8dBi , You can say the antenna A Than antenna B The gain is large ().
- A. uncertain
- B. 3 dBd
- C. 3 dBi
- D. 3 dB
Answer: D
NEW QUESTION 188
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