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NEW QUESTION 156
In point-to-point (PtP) wireless transmission, the most suitable antenna type is?
- A. Omnidirectional antennas at both ends
- B. One end omnidirectional antenna, one end directional antenna
- C. Directional antenna at both ends
Answer: C
NEW QUESTION 157
Which of the following description of the area with a small radius and few concurrent users is correct? (Multiple choice)
- A. When planning the coverage of residential households, the AP placement location should be selected reasonably to take into account the wireless signal coverage of each room.
- B. Generally speaking, small meeting rooms, bars, cafes, residential homes, etc. belong to this type of area.
- C. Such areas generally have a radius of less than 60m, and there are not many users connected.
- D. Generally speaking, one AP can meet the requirements of wireless signal coverage and the number of users in such areas. The key is to select the appropriate AP installation location and installation method.
Answer: A,B,C,D
NEW QUESTION 158
In the configuration of the wireless controller function, if you need to modify the service template or the related configuration of the virtual wireless interface that is already in use, the first step is to configure ________.
- A. undo wlan enable
- B. service-template disable
- C. radio disable
- D. port-security disable
Answer: B
NEW QUESTION 159
Air interface channel utilization interruption rate" is an important indicator for judging the current channel busyness of P AP, by checking the "air interface of P AP." "Channel utilization" can determine the current occupancy of this channel.
Which of the following description about how to view "air interface channel utilization" is correct? (Multiple choice)
- A. By default, the system checks the channel utilization every 9 seconds;
- B. In the hidden command mode, use the command "display ar5d radio-num channelbusy" to query the "air interface channel utilization";
- C. When viewing the value through the command, the system will count the channel utilization value of the last 20 times;
- D. When the AP's working channel is switched, the system will clear the statistical record value.
Answer: A,B,C,D
NEW QUESTION 160
Which of the following substances attenuates the WLAN signal the most ()
- A. Glass
- B. Bricks
- C. The human body
- D. Metal
Answer: D
NEW QUESTION 161
Which of the following are not the shortcomings of FAT AP?
- A. No wireless controller required, can work independently
- B. FAT AP software is stored on the AP, and the software needs to be upgraded one by one when the software is upgraded, which requires a lot of maintenance work
- C. Each FAT AP only supports individual configuration, and the configuration of a large network requires a huge workload for AP configuration.
- D. The configuration of FAT AP is saved on the AP, the loss of AP equipment can cause the leakage of system configuration
Answer: A
NEW QUESTION 162
What does the key indicators of the combiner include? (Multiple choice)
- A. Insertion loss
- B. Frequency
- C. Channel isolation
- D. In-band fluctuation
Answer: A,B,C,D
NEW QUESTION 163
The signal strength I Mean RSSI displayed by the wireless device can directly reflect the quality of the link, but the actual noise floor is related to the environment and interference and will change from time to time. While the RSNR is relatively stable (for a fixed environment and transmit power), It can be considered to be related to the transmission power, the antenna used by the equipment, the distance of the equipment, the space attenuation, etc., but when the equipment is installed, the RSNR is often relatively fixed.
The following description of the relationship between noise floor and I RSSI, which is correct?
- A. In a fixed network, if the noise floor increases, the RSSI will decrease, otherwise, if the noise floor decreases, the RSSI will increase.
Answer: A
NEW QUESTION 164
What is the type of radio frequency interface in the picture?
- A. SMA male
- B. N-type male
- C. SMA female
- D. SMA reverse polarity male connector
- E. N-type female
- F. SMA reverse polarity female
Answer: F
NEW QUESTION 165
On the H3C wireless controller, wireless users connected under the same SSID can be assigned to different VLANs. The specific implementation methods are ______. (Multiple choice)
- A. Statically bind the wireless client on the controller to score the MAC address and vlan
- B. After passing the authentication, radius dynamically issues the client vlan attributes
- C. Specify different vlan attributes when adding the same service template (ie SSID) under different Aps
Answer: A,B,C
NEW QUESTION 166
When 802.11n works in the 2.4GHz frequency band, the number of non-interfering channels that can be provided in the 40-bandwidth mode is?
- A. 1 or 0
Answer: A
NEW QUESTION 167
Regarding the two ways that the wireless client g Scaning scans the WN LAN network, which ones are correct? (Multiple choice)
- A. When the AP turns on the hidden SSID function, it will only respond to the broadcast Probe Request message sent by the STA
- B. Probe Request sent by STA has two types: broadcast type and unicast type. The difference lies in whether the specific SSID name is carried in the message
- C. There are two ways of active scanning and passive scanning. A client will only choose one method
- D. Active scanning is realized by STA by monitoring Probe Response messages sent by AP
- E. When the AP hides the SSID, the STA can only discover the services provided by the AP through active scanning
Answer: A,C,E
NEW QUESTION 168
Which of the following descriptions about 3 WX6103 wireless controller is correct?
(Multiple choice)
- A. The main control board and business version of WX6103 can be mixed.
- B. WX6103 and S75E, S95, S95E wireless controller boards belong to the H3C WX6000 series. Shared system files.
- C. WX6103 supports dual main control, dual power supply, each main control board can manage 128 APs by default, and can be expanded to 640 through license upgrade.
- D. The two main control boards of WX6103 can realize 1+1 backup between wireless controller modules through corresponding configuration.
Answer: B,C,D
NEW QUESTION 169
Which of the following statements about wireless bridges are correct? (Multiple choice)
- A. Bridged links can be cascaded, but because each level of bridge will bring about 50% of the link bandwidth loss and increase the delay, it is not recommended to use multi-level bridge cascading
- B. For long-distance bridging, it is generally used with high-gain directional antennas, and ensure that the Fresnel zone between the AP connections at both ends of the bridge is free from obstruction.
- C. Thin AP and thin AP cannot bridge each other
- D. Fat AP and fat AP can bridge each other
- E. Fat AP and thin AP can bridge each other
Answer: A,B,D,E
NEW QUESTION 170
When planning a WLAN network, the first thing that should be considered is the effective interaction of wireless signals between the P AP and the wireless terminal, followed by the effective broadband of the access user.
- A. True
- B. False
Answer: A
NEW QUESTION 171
In order to increase the universal type, the FIT AP version of wireless products will no longer be released separately, and they will all be included in the corresponding controller version package file.
- A. True
- B. False
Answer: A
NEW QUESTION 172
In a certain SBSS system, if all A STA are configured with high priority according to e 802.11e, the performance and throughput of the entire network can be improved.
- A. False
- B. True
Answer: A
NEW QUESTION 173
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