H12-311_V3.0 Exam Questions
476 real H12-311_V3.0 exam questions with expert-verified answers and explanations. Page 4 of 10.
- Question #151
Which port number of the control message of the CAPWAP tunneling protocol?
- Question #152
Which one does the roaming of terminals in different VLANs belong to?
- Question #153
Which one does the roaming of terminals in different VLANs belong to?
- Question #154
CAPWAP tunnel encapsulation AC side data message port number is 5246, control message port number is 5247.
- Question #155
What is the systematic process of AP radio resource management?
- Question #156
Regarding the working principle of 5G priority, which of the following statement is correct?
- Question #157
There are many video conferences in large companies, and QoS generally adopts which of the following service model?
- Question #158
Which of the following is the reason for adopting 5G priority access?
- Question #159
Regarding the description of the characteristics of Huawei WLAN products, which of the following statement is correct?
- Question #160
Which of the following is not the main purpose of roaming?
- Question #161
When the 802.11 message sent by the STA is to enter the Ethernet through the AP, it is converted into an 802.3 message, which does not belong to the priority mapping method?
- Question #162
The Int-Serv model provides end-to-end absolute QoS guarantee for users, which of the following reason for the failure of large-scale commercial use?
- Question #163
In order to facilitate management and maintenance, the AP power supply method is generally preferred to select which of the following for power supply?
- Question #164
The network cable used in the project should theoretically not exceed how many meters?
- Question #165
AP can provide power supply and data transmission through POE switch.
- Question #166
Various pipes, metal keels and aluminum alloy gussets in the ceiling will have a great impact on the actual signal coverage effect.
- Question #167
The 802.11 protocol that defines the quality of service in WLAN is?
- Question #168
In order to obtain better coverage effect, how can the AP signal pass through the wall as much as possible?
- Question #169
For the 3 APs deployed on the first floor, the channels from left to right are 1, 6, and 11 respectively. At this time, the channels of the 3 APs deployed on the 2nd floor should b...
- Question #170
The two commonly used units to describe antenna gain are dBi and dBd, and the conversion relationship between them is: dBi=dBd+2.14.
- Question #171
The omnidirectional antenna is shown as () degrees on the horizontal direction diagram.
- Question #172
The lobe width is a very important parameter commonly used in directional antennas. It refers to the width of the angle formed by the radiation pattern of the antenna below the pea...
- Question #173
Which of the following can be explained by the gain of the antenna?
- Question #174
Metal objects have a greater attenuation effect on wireless signals, so APs or antennas should not be placed behind metal ceilings, etc.
- Question #175
The AC executes the load balancing process according to which of the following information?
- Question #176
Which of the following is a prerequisite for enabling the Huawei load balancing function?
- Question #177
When channel 1 of the 2.4GHz frequency band in the coverage area has a lot of interference and is serious, adjusting the device to channel 3 can effectively reduce interference.
- Question #178
The power of AP installed indoors is generally () mW.
- Question #179
Capacity planning mainly starts from the aspects of equipment performance, number of users, bandwidth requirements and wireless environment, etc., and estimates the number of APs r...
- Question #180
Among the following obstacles, which of the following has the largest loss of wireless signals?
- Question #181
Which of the following can be connected through AP and antenna?
- Question #182
If there is a high demand for WLAN capacity in a certain coverage area, which of the following should be considered by the construction method?
- Question #183
For the selection of WLAN coverage antennas, it is recommended to select () for narrow and long areas, and it is recommended to select () for open short-distance areas.
- Question #184
The index used to describe the degree of concentration of the antenna on the transmission power is ().
- Question #185
A 10-story building needs to cover WLAN signals, because considering the floor blocking, the signal frequency of WLAN on the 5th and 6th floors can be set to 6 channels at the same...
- Question #186
If the transmit power of the AP is 1mW, after converting to dBm, it will be () dBm.
- Question #187
20dBm is equivalent to () mW.
- Question #188
In what way does the antenna gain?
- Question #189
Antenna A has a gain of 11dBi, and antenna B has a gain of 8dBi, so how much greater is the gain of antenna A than antenna B?
- Question #190
For areas with roaming requirements, the coverage of adjacent APs should maintain an overlap of more than 50%, so as to ensure the smooth switching of terminals between APs.
- Question #191
When the distance between the center frequencies of two channels is less than or equal to 25MHz, there will be overlapping areas between the channels, and there will be some interf...
- Question #192
Huawei's load balancing judgment methods include traffic mode, session mode, and virtual switching mode.
- Question #193
For indoor distributed AP, which of the following description is correct?
- Question #194
The number of users is 300, the concurrency rate is 70%, and the terminal supports 2.4GHz and 5GHz frequency bands. According to the maximum number of dual-band access users per AP...
- Question #195
AP transmit power 20dBm, antenna gain 4dBi, cable and device loss 1dB, terminal receiving antenna gain 2dBi, space propagation loss 80dB, terminal receiving level RSSI= ().
- Question #196
For outdoor long-distance point-to-point backhaul, the antenna of ( ) should be selected.
- Question #197
Which of the following descriptions of power splitters and couplers is correct?
- Question #198
If an AP has been added offline, the AP can go online directly.
- Question #199
Which of the following command can view the current version information?
- Question #200
Which of the following commands can view the current configuration of AC?