H20-311 Questions And Answers


Exam Name: HCS-Field-WLAN (Huawei Certified Field Specialist - WLAN)

Updated: 2019-01-19

Q & A: 169

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Question No : 1

Which of the following description about EIRP is wrong ?( )
A. In a wireless communication engineering, EIRP is usually used to measure the intensity of interference, and the ability of transmitter to transmit a strong signal
B. EIRP is the product of radio transmitter power supplied to the antenna and the antenna in a given direction absolute gain
C. EIRP represents the terminal received AP signal strength
D. EIRP = P transmission power -Loss feeder loss + G antenna gain
Answer: C

Question No : 2

AC configuration is as follows, how long is the length of terminals and AP interaction message need to open RTS/CTS? ()
[6605-wlan-view] radio-profile id 1
[6605-wlan-radio-prof-2.4G] rts-cts-mode rts-cts
[6605-wlan-radio-prof-2.4G] rts-cts-threshold 1500
A. <1500 Byte
B. 1500 Byte
C. >1500 Byte
D. 1024 Byte
Answer: C

Question No : 3

In WDS point to multipoint mode, how many Leaf AP can a Root AP maximum connect ( )?
A. 2
B. 4
C. 6
D. 8
Answer: C

Question No : 4

Which of the following certification of roaming time is the longest? ( )
B. 802.1xcertification
D. PortaI
Answer: B

Question No : 5

Which of the following description about the large enterprise BYOD network is not correct ? ( )
A. network is divide into access layer, distribution layer, the core layer
B. AP is connected to the access layer switches, it is recommended to use POE Switch
C. AC can use core switches built-in AC card to realize
D. At the access layer can use to hang the cartridge AC to implement wireless centralized control function
Answer: D

Question No : 6

Which of the following AP support 802.11ac standard? () (multiple choice)
A. AP5030DN
B. AP5130DN
C. AP6510DN
D. AP7110DN
Answer: AB

Question No : 7

Which of the following descriptions about WLAN forwarding mode are not correct? ( ) ( multiple choice)
A. WLAN forwarding model includes local forwarding mode and centralized forwarding mode
B. data packet local forwarding mode is also called tunnel forwarding mode, service data packets uniformly encapsulated by the AP reached AC to achieve forwarding, AC not only for management of AP, but also as a forwarding maincenter of AP traffic
C. data packet local forwarding, means AP management flow encapsulated in CAPWAP tunnel, terminate when reaching the AC; AP traffic flow without CAPWAP encapsulation, and by the AP sent directly to the switching device for forwarding
D. data packet centralized forwarding , means AP management flow encapsulated in CAPWAPW tunnel, terminate when reaching the AC; AP traffic flow without CAPWAP encapsulation, and directly by the AP sent to the switching device for forwarding
Answer: BD

Question No : 8

What factors are mainly related to AP amount estimation? ( ) (multiple choice)
A. user bandwidth demand
B. the number of users
C. AC model
D. if need to use the dual-link backup
Answer: AB

Question No : 9

Which of the following certification ways need to deploy radius server? ( ) (multiple choice)
A. WEP certification
B. WPA-PSK certification
C. MAC certification
D. WPA-EAP certification
Answer: CD

Question No : 10

Which of the following statement about Fresnel zone is wrong? ( )
A. Fresnel zone of the radio wave beam is a ellipsoid area directly surrounding visible sight path
B. antenna installation location to ensure the link two nodes visible, try to ensure Fresnel zone without barrier
C. Site link two nodes visible, Fresnel zone boundary will be blocked part, will not affect the link transmission effect
D. site 2 kilometers away, and generate Fresnel zone radius of about 6 meters
Answer: C

Question No : 11

Which of the following Huawei switches support PoE function? ( )
A. 52700-9TP-PWR-EI
B. 55700-24TP-PWR-SI
C. 53700-52P-EI-245-DC
D. 55700-48TP-SI-AC
Answer: AB

Question No : 12

Which of the following options does not belong to the WLAN AC high reliability standby type? ()
A. AC dual-link cold stand-by
B. AC configuration backup
C. AC dual-link hot standby
D. VRRP dual machine hot standby
Answer: B

Question No : 13

The following options, which is the inherent attribute of the antenna? () (multiple choice)
A. horizontal lobe, vertical lobe
B. Downtilt
C. azimuth
D. Gain
Answer: AD

Question No : 14

In Huawei wireless networks, which address is used with AP to establish CAPWAP tunnel on the AC? ( )
A. Internet address
B. WLAN source address
C. AP management address
D. WEAN business address
Answer: B

Question No : 15

Which of the following is not a rail transit redundancy business design? ( )
A. train-ground wireless link redundancy
B. CBTC deploy dual wireless networks
C. PIS train-ground communication dual-network
D. use 802.11n protocol
Answer: D

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