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NEW QUESTION 114
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 115
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 116
Which of the following operation methods can reduce signal interference? (Multiple choice)
- A. Adopt 11a and 11g mixed deployment method
- B. Adjust the transmit power of some APs
- C. Use non-overlapping channels for network optimization
- D. Troubleshoot and eliminate sources of interference in the on-site environment, such as microwave ovens, Bluetooth and cordless phones, etc.
Answer: A,B,C,D
NEW QUESTION 117
H3C N-to-N cable is used to connect outdoor APs with N-type connectors and outdoor antennas or to extend the feeder with N-type double female connectors. There are three sizes of 11.83m, 44.5m and _____m. You can choose to purchase this type of cable directly to save the trouble of processing NN-type adapter cables.
- A. 0
- B. 6.1
- C. 1
- D. 2
Answer: C
NEW QUESTION 118
The concepts of receiving sensitivity and maximum transmit power are consistent, and both express the same meaning.
- A. False
- B. True
Answer: A
NEW QUESTION 119
In order to reduce the impact of the surrounding environment and ensure the stability of the wireless bridging equipment, how much frequency band is usually used to establish bridging applications? at the same time, the working channels of the two bridging equipment are?
- A. 2.4Ghz, must be the same
- B. 5.8Ghz, must be the same
- C. 2.4Ghz, can be different
- D. 5.8Ghz, can be different
Answer: B
NEW QUESTION 120
The original WLAN room dividing and combining system adopts the 802.11b standard, and the AP uses WLAN dry amplifier for power amplification. Will the current power transformation be carried out to upgrade 802.11b to 802.11g, can the original indoor distributed system be directly used for dry discharge?
- A. No
- B. Yes
Answer: A
NEW QUESTION 121
For outdoor antenna installation, the wind resistance of the antenna can be ignored.
- A. False
- B. True
Answer: A
NEW QUESTION 122
The wireless client can search for WLAN signals but cannot associate with the AP. What are the possible reasons? (Multiple choice)
- A. Too many users associated with the AP
- B. There are strong interference sources in the surrounding environment
- C. The AP is too far away or there are too many obstacles, and the signal strength is lower than the receiving sensitivity of the wireless network card
- D. The encryption method of the client's wireless network card is inconsistent with the AP
Answer: A,B,C,D
NEW QUESTION 123
When the H3C outdoor AP is installed in an outdoor environment and travels through the Ethernet line, the network port lightning protection device is required for the lightning protection of the near-end switch. The following is the port diagram of the POE-MH network port lightning protection device. Judging by the picture, which port is used to connect to the near-end switch?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 124
In the g 802.11a/g protocol, OFDM transmission technology defines how many sub-channels, of how many sub-channels are used to transmit data?
- A. 52, 36
- B. 52, 48
- C. 50, 48
- D. 48, 36
Answer: B
NEW QUESTION 125
According to the propagation characteristics of electromagnetic waves, under other conditions, the relationship between the frequency of electromagnetic waves and its coverage, which is correct?
- A. The higher the frequency of electromagnetic waves, the smaller the coverage.
Answer: A
NEW QUESTION 126
C H3C wireless controllers using e License mechanism managed the number of P AP, wherein 3 WX6103 wireless is on MPU, can manage default ___ APs, License step size is ___, can manage up to ____ APs.
- A. 256 ； 128 ； 512
- B. 128 ； 128 ； 256
- C. 128 ； 128 ； 640
- D. 256 ； 128 ； 640
Answer: C
NEW QUESTION 127
The transmit power is 7dBm, what is the corresponding transmit power?
- A. 10mw
- B. 5mw
- C. 7mw
- D. 20mw
Answer: B
NEW QUESTION 128
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 129
Which of the following are the shortcomings of FAT AP? (Multiple choice)
- A. 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
- B. No wireless controller required, can work independently
- C. Each FAT AP supports individual configuration, and building a large network has a huge workload for AP configuration
- D. The configuration of the FAT AP is saved on the AP, and the loss of the AP device can cause the leakage of the system configuration
Answer: A,C,D
NEW QUESTION 130
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. Fat AP and thin AP can bridge each other
- C. Thin AP and thin AP cannot bridge each other
- D. Fat AP and fat AP can bridge each other
- E. 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.
Answer: A,B,D,E
NEW QUESTION 131
If the P FIT AP fails to register successfully during the Layer 2 registration process, the following information can be obtained by p debug |wapp on the wireless controller side:
*Oct 17 14:38:05:117 2008 5002 LWPS/7/Event: Discovery request message received from AP with WA2220E-AG Model and Serial-ID 210235A22WC07C000300
*Oct 17 14: 38: 05: 127 2008 5002 LWPS/7/Error: AP not found for Serial-ID 210235A22WC07C000300
*Oct 17 14:38:05:137 2008 5002 LWPS/7/Error: Discovery request is dropped due to Processing failed. What is the reason why FIT AP failed to register?
- A. AC version information is incorrect
- B. AP version information is incorrect
- C. The serial number configured on the AP is incorrect
- D. The serial number configured on the AC is incorrect
Answer: D
NEW QUESTION 132
Which of the following is greater than the RI SSI requirement for wireless terminals in the medical industry?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 133
336. What is the correct way to deal with the feeder interface waterproof?
- A. Wrap it with insulating tape first, then wrap it with a layer of insulating tape, and finally add a layer of waterproof tape to seal it.
- B. Wrap it with waterproof tape first, then wrap it with a layer of insulating tape, and finally seal it with a layer of waterproof tape.
- C. Wrap it with insulating tape first, then wrap it with a layer of waterproof tape, and finally add a layer of insulating tape to seal it.
- D. Wrap it with waterproof tape first, then wrap it with a layer of insulating tape, and finally add a layer of insulating tape to seal it.
Answer: C
NEW QUESTION 134
Regarding the precautions in the wireless network survey and design process, which of the following statement is correct? (Multiple choice)
- A. When configuring AP frequency points, first perform frequency detection on the target area, and avoid using channels that are already used by APs in the coverage area.
- B. In the WLAN project, it is necessary to understand the materials of the building and various surrounding substances through on-site surveys, and to estimate its influence on the wireless signal, so as to determine the safe installation location of the WLAN equipment.
- C. When measuring the penetration loss of the AP signal from obstacles such as walls, the incident angle of the AP signal needs to be considered.
- D. When configuring the frequency point of outdoor AP coverage area, in order to achieve effective coverage of AP and avoid mutual interference between channels, follow the cellular coverage principle of the mobile communication system during channel allocation.
Answer: A,B,C,D
NEW QUESTION 135
In wireless network survey and design, when covering floors and areas with business needs, the received signal strength of more than 95% of the target coverage area should be greater than or equal to ______. The signal strength of the key coverage area should be greater than or equal to _______.
- A. -80dBm ； -75dBm
- B. -90dBm ； -85dBm
- C. -85dBm ； -80dBm
- D. -75dBm ； -70dBm
Answer: D
NEW QUESTION 136
Through the command "display wlan client mac-address XXXX-XXXX-XXXX", you can view the detailed operating status of the wireless client.
Which onr reflects the strength and quality of the signal received at the client? (Multiple choice)
- A. SNR
- B. Wireless mode
- C. Roam Status
- D. RSSI
Answer: A,D
NEW QUESTION 137
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 138
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