Which of the following is not a method to increase the coverage signal strength range?
- A . Adjust AP position
- B . Reduce the transmit power
- C . Adjust the antenna angle
- D . Increase the transmit power
What is the core of the wireless medical positioning system ?
- A . WIFI network
- B . Positioning engine
- C . TAG label
- D . Monitoring platform
Pre-sales network planning is a kind of business development, not a big project generally does not need to be undertaken.
- A . TRUE
- B . FALSE
The 14 channels in 2.4 GHz only support the 802.11b protocol, which is only available in Japan.
- A . TRUE
- B . FALSE
In the VRRP hot backup scenario, which of the following description of the WAC ‘s CAPWAP source address is correct?
- A . The address where the AP accesses the WAC is the physical address of the main WAC
- B . WAC ‘s CAPWAP source address is the primary and standby WAC virtual address
- C . Any address configured in WAC can be
- D . The address where the AP accesses the WAC is the physical address of the standby WAC
When planning a LAN network and calculating the number of APs , only the bandwidth load needs to be considered.
- A . TRUE
- B . FALSE
Which of the following options is the most important reason for small and medium enterprises to use WLAN?
- A . Video surveillance
- B . Wireless office
- C . Voice conference
- D . Code scanning
In order to prevent network attacks based on source address spoofing, the binding table matching check is performed on the received IP packets to prevent illegal packets from passing through the AP and improve the security of the network. Which of the following functions can be enabled?
- A . Dynamic ARP inspection function
- B . Flood attack prevention function
- C . ND Snooping function
- D . AP ‘s IPSG function
The life cycle of Huawei’s enterprise services has 5 different stages: Plan, Design, Implement, Operate, and Improve, referred to as PDTOI .
- A . TRUE
- B . FALSE
When deploying a WLAN network, a reasonable CCA threshold can be configured to reduce signal interference and increase the degree of channel reuse. If AP deployment is dense and you want to reduce the actual coverage area to ignore weak remote signals, and increase the CCA threshold.
- A . TRUE
- B . FALSE
By default, the period for AP to send Beacon frames is 100 TUs.
- A . TRUE
- B . FALSE
What does the AP shown in the figure below belong to?
- A . AP2010DN indoor panel AP
- B . AP6010DN indoor released AP
- C . AP6310DN indoor distributed AP
- D . AP6510DN outdoor AP
In the WLAN Tester 2.0 heatmap, the tip box displays the information as shown in the figure below. According to the information in the figure, which statement is correct?
- A . Tip displays the signal information around the point
- B . Tip box must be placed on the heatmap for 3S and above to be displayed
- C . The SINR and PHY Data Rate not shown in the Tip box are all 0
- D . The Tip box only displays the SINR and PHY Data Rate of the maximum field strength value
As shown in the figure below, the best channel of the AP in the lower left corner should be planned as :
- A . 1 channel
- B . 6 channels
- C . 11 channels
- D . 14 channels
Which of the following descriptions about using the WLAN Tester 2.0 tool to conduct site surveys is correct?
- A . New project → import drawing → set scale → load network card → start → dotting → end
- B . New project → import drawings → load network card → set scale → start → dotting → end
- C . New project → import drawing → set scale → start → dotting → end
- D . New project → set scale → import drawings → load network card → start → end
In a school dormitory scenario, WLAN needs to be deployed , and the customer proposes to maximize the bandwidth. Which of the following methods can best meet the customer’s needs?
- A . AP6310SN Power Fraction Scheme
- B . AP6310SN coupling scheme
- C . AP9330DN room division plan
- D . AD9430DN agile distributed solution
20dBm converted into a power of 100mW , 23dBmconverted into a power
of200mW.
- A . TRUE
- B . FALSE
When planning indoor WLAN , it is recommended that the deployment height of omnidirectional antennas does not exceed 6m .
- A . TRUE
- B . FALSE
The fixed-length feeder used by AP9330DN has four specifications of 5m/10m/15m/20m . If it exceeds 20m, it needs to be cut to an appropriate length on site according to the actual situation.
- A . TRUE
- B . FALSE
In the WDS+ dual link scenario, the number of heartbeat packet detections should be set as:
- A . 1
- B . 3
- C . 6
- D . 9
During the WLAN security planning, in order to support the self-registration of visitors, it is recommended that the authentication method which is set for visitors is:
- A . WEB authentication
- B . WPA-PSK
- C . WEB-Portal authentication
- D . dot1x authentication
Which of the following are not the rail transit redundant service design?
- A . Train-ground wireless link redundancy
- B . CBTC deploys dual wireless networks
- C . PIS train-ground communication dual network
- D . Use 802.11n protocol
In which of the following situations, the DHCP relay function must be enabled?
- A . When the DHCP server and terminal is not in the same VLAN
- B . When the DHCP server needs security protection
- C . When the terminal uses dotlx authentication
- D . When the terminal is a visitor’s web portal authentication
WLAN high-density venue services can achieve 100% user concurrency with a good experience .
- A . TRUE
- B . FALSE
A company wants to deploy outdoor WLAN, the AP equipment selected is Huawei outdoor AP6510DN. In order to save costs, engineers plan to directly supply power to the AP through AC6605. At this time, AC6605 just installed a 500W of PoE power modules, AC6605 work requires 120W of power, then how many AP6510DN can the AC6605 power?
- A . 4
- B . 12
- C . 20
- D . 24
Which of the following wireless applications has higher requirements to bandwidth and real-time?
- A . Mobile office
- B . Wireless medical
- C . Rail transit
- D . Video postback
Calculation formula of signal field strength (without considering factors such as interference and line loss) is:
- A . Final signal field strength = antenna gain – transmission distance attenuation value – obstacle signal attenuation
- B . Final signal field strength = AP transmit power + antenna gain – transmission distance attenuation value – obstacle signal attenuation
- C . Final signal field strength = AP transmit power – transmission distance attenuation value – obstacle signal attenuation
- D . Final signal field strength = AP transmit power + antenna gain + transmission distance attenuation value – obstacle signal attenuation
In a project, the two sites are 3km apart , but there is an 18m high building in the middle of the two points, and there are no higher obstacles in other locations. When using 5G backhaul, how many meters should the installation height of the two sites be at least?
- A . 20
- B . 25
- C . 30
- D . 35
Within the coverage of WLAN , the accuracy of wireless positioning is closely related to AP signal coverage.
- A . TRUE
- B . FALSE
In WDS and Mesh networks, in order to avoid interference from other signals on the backbone link, the 2.4GHz frequency band is generally used as the frequency band for network backhaul.
- A . TRUE
- B . FALSE
In outdoor WLAN deployment scenarios, channel design must consider radar channel interference.
- A . TRUE
- B . FALSE
What AP models can be used for indoor WLAN deployment?
- A . AP5010SN
- B . AP6010SN
- C . AP6310SN
- D . AP6510DN
In the WLAN outdoor coverage scenario, in order to ensure the balance of the uplink and downlink, which of the following is the most effective way?
- A . Use a larger gain antenna
- B . Reduce AP reflected power
- C . Use an antenna with a smaller gain
- D . Increase AP transmit power
A 5dB coupler has a coupling degree of 5dB and an insertion loss of 2dB . If the input signal power is 17dBm , the output power of the coupling port is :
- A . 10dBm
- B . 12dBm
- C . 14dBm
- D . 15dBm
The correct process of the WLAN network planning is:
- A . Demand collection → pre-sale network planning → customer exchange quotation → detailed site survey → after-sale network planning
- B . Demand collection → Pre-sale network planning → Detailed site survey → After-sale network planning
- C . Demand collection → customer exchange quotation → detailed site survey → after-sales network planning
- D . Demand collection → Pre-sale network planning → Customer exchange quotation
In WLAN outdoor scenarios, how many AT815SNs can be connected to AP6510DN at most?
- A . 4
- B . 8
- C . 16
- D . 32
In the AC dual-link cold standby network, when the priority of the active and standby ACs is the same, which condition will the AP compare to select the active AC first?
- A . Compare the AP load on the AC , and prefer the AC with a small load as the main AC
- B . Compare the size of the source IP of the AC , and prefer the AC with the smaller IP as the main AC
- C . Comparison of AC traffic on select small flow of AC as the main AC
- D . Compare the STA load on the AC , and prefer to select the AC with a small load as the main AC
Which of the following authentication methods has the best security?
- A . WEP authentication
- B . WPA2-PSK authentication
- C . WPA2-EAP authentication
- D . MAC authentication
How much mw can 17dBm be converted into?
- A . 100
- B . 80
- C . 50
- D . 40
In the active /standby dual link scenario, the default setting of CAPWAP heartbeat is :
- A . 15s * 6
- B . 25s * 3
- C . 20s * 3
- D . 25s * 6
The indoor panel AP layout design must be equipped with 86 boxes for installation.
- A . TRUE
- B . FALSE
In the ACU2 solution of an independent AC board in a WLAN campus network project , the switch where the board is located and the ACU2 board are logically two independent network elements, that is, independent management equipment.
- A . TRUE
- B . FALSE
A certain park needs to achieve full WLAN coverage. The Park has a length and width of 100mx100m and a pole that can be installed in the middle. The capacity requirement is low. Which of the following antennas is most suitable for the above scenario?
- A . H20_7dBi_V20
- B . H360_3dBi_V22
- C . H15_18dBi_V15
- D . H360_11dBi_V9
In the HT40 mode, the main channel sends beacon messages and some data messages, and the auxiliary channel sends other messages.
- A . TRUE
- B . FALSE
Which of the following encryption algorithms has the highest security strength?
- A . WEP
- B . TKIP
- C . CCMP
- D . DES
On the Huawei modular switch S12708, the ACU2 board supports a larger AP capacity than the X1E board.
- A . TRUE
- B . FALSE
WLAN network planning in the financial industry needs to consider the planning and design of Monitor AP to enhance security.
- A . TRUE
- B . FALSE
What is the operating temperature range of Huawei outdoor AP8130DN?
- A . -20 degrees Celsius ~ +55 degrees Celsius
- B . -40 degrees Celsius ~ +60 degrees Celsius
- C . 0 degrees Celsius ~ +60 degrees Celsius
- D . -40 degrees Celsius ~ +40 degrees Celsius
When using the WLAN planning tool, for areas that have coverage field strength requirements but do not have access to the number of people and bandwidth requirements, which type of area description should be used?
- A . Key coverage areas
- B . Normal coverage area
- C . Dead zone
- D . AP deployment area
WLAN survey when engineers need to determine the coverage of the target customer requirements, currently covered are: major coverage target, secondary coverage target and special target, the field strength in the coverage targe need to be between -65dBm ~ -85dBm .
- A . TRUE
- B . FALSE
Under normal circumstances, when the material is the same thickness, which of the following obstacles will attenuate the 2.4GHz signal the most?
- A . Metal
- B . Asbestos
- C . Wooden door
- D . Tinted glass
In the WLAN wireless city scenario, the throughput test of the wireless terminal is performed. Under the same conditions, which of the following descriptions is correct?
- A . TCP flow is larger than UDP flow
- B . TCP flow is equal to UDP flow
- C . TCP flow is smaller than UDP flow
- D . Other options are wrong
In a room sub-system, using AP9330DN , each indoor antenna can be set to a different channel to avoid co-frequency interference.
- A . TRUE
- B . FALSE
Xiao Zhang is a network administrator of a hotel. One day he found that the hotel visitors could not access the network normally. After checking, he found that the visitor’s device got the wrong IP address. In order to prevent this kind of attack, which of the following technology should be used in the network?
- A . DHCP Snooping
- B . Dynamic ARP inspection (DAI)
- C . IP source protection (IPSG)
- D . MAC authentication
FAT AP is also called " fat " AP architecture or self-made structure. It is currently mainly used in large and medium-sized enterprise networks and is a mainstream architecture solution.
- A . TRUE
- B . FALSE
Which of the following descriptions about the steps of Layer 2 roaming is wrong?
- A . STA monitors each channel beacon, finds that AP2 meets the roaming conditions, and sends a probe request to AP2
- B . After AP2 receives the request in channel 6 (the channel used by AP2), it responds by sending a response in channel 6
- C . STA transmits 802.11 disassociation information to AP1 through channel 6 (the channel used by AP2), disassociate the user from AP1
- D . STA sends an association request to AP2 through channel 6, and AP2 responds with an association response to establish an association between the user and AP2
Which of the following objects or materials has the greatest penetration loss for WLAN signals ?
- A . Wooden door
- B . Glass windows
- C . Brick wall
- D . Metal
Which of the following is wrong about the Fresnel zone?
- A . The Fresnel zone of the radio wave beam is an ellipsoidal area directly surrounding the visible line of sight
- B . The antenna installation position must ensure that the nodes on the two links are visible, and try to ensure that there are no obstructions in the Fresnel area
- C . The nodes of the two sections of the site link are visible, and the blocked part of the Fresnel area boundary will not affect the link transmission effect
- D . The sites are 2 kilometers apart , and the resulting Fresnel area is about 6 meters in radius
The user traffic of an enterprise’s WLAN is not very large, and there is no traffic bottleneck problem in the network. For WLAN security, customers want to manage WLAN data in a unified manner. Which of the following networking methods can the customer choose ?
- A . AC bypass data direct forwarding
- B . AC bypass data tunnel forwarding
- C . Layer 3 network data direct forwarding
- D . Layer 2 network data direct forwarding
If an enterprise wants to deploy WLAN without interrupting the business , please choose () controller as the best strategy: 500 wireless terminals for the enterprise , including laptops, smart phones, wireless cameras, etc.; enterprise switching network access layer is 3700 series switches, the core layer is 5700 series switches, and the company’s export is NE20 routers; enterprises need to implement user grouping and QOS strategies.
- A . Use AR3260 bypass as AC
- B . Use AC6605 direct-connection as AC
- C . Use AC6605 bypass as AC
- D . Use ACU2+77 switch as AC
What kind of wireless frame is used when AP takes countermeasures against illegal terminals?
- A . Beacon frame
- B . Disassociate the frame
- C . De-authentication frame
- D . Probe frame
In the case of terminal support, which of the following encryption methods support fast roaming?
- A . wpa+psk
- B . wpa2+psk
- C . wpa2+802.1x
- D . wep
When AP8030DN is placed on the roof of a building to cover the outdoor area, it can usually cover the indoor area well.
- A . TRUE
- B . FALSE
For an open office area, there are 8 office areas, each office area has 10 people, each user requires a downlink bandwidth of 2Mbps , and the concurrent Internet access rate of all users is 80% . How many AP5030DNs are needed for this floor of office building ? The
measured rate ofeachAPis about80Mbps, without considering other factors such as attenuation and interference, only the number of APs is calculated from the bandwidth .
- A . 1
- B . 2
- C . 3
- D . 4
In the process of WLAN site survey personnel using WLAN Survery Pad engineering survey tool investigating, it needs to add the Pin to the location of the special information to be recorded. Pin label supports five major function of viewing records, photographs, text recording, voice recording and deleting marked.
- A . TRUE
- B . FALSE
A large enterprise wants to build an office network based on WLAN , and now wants to run a routing protocol between two core switches and multiple ACs . It requires the use of an open standard IGP protocol and supports the area division function. Which of the following protocols is the most preferred?
- A . RIP
- B . OSPF
- C . EIGRP
- D . BGP
How much dB is the angle at which the directional antenna attenuates the main lobe width of the phenomenon?
- A . 3
- B . 4
- C . 5
- D . 6
The transmit power of AP6310SN is 27dBm . After a two-power splitter (insertion loss 0.5dB), one port is connected to a 3dBi omnidirectional antenna, and the other port is connected to a 7dB i antenna, then the output power of the two antennas (without considering the feeder and interface loss) respectively are:
- A . 25dBm, 32dBm
- B . 26.5dBm, 26.5dBm
- C . 28dBm, 32dBm
- D . 26.5dBm, 30.5dBm