H12-311_V3.0-ENU Online Training Archives

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1. When did the initial application of wireless networks begin ()?

During the First World War

During the Second World War

20 Late century

2000 Years later

2. WLAN What are the working frequency bands ()? (Select 2 Answers)

2 GHz

5 GHz

5.4 GHz

2.4 GHz

3. Huawei Box Wireless Controller AC6605 support twenty four Piece PoE Interface in WLAN Can be directly connected when networking AC of AP Make a supply Electricity.

True

False

4. pass through FTP Way to upgrade AP, You need to ensure AP and FTP Servers can communicate with each other, and AP Put the upgrade file in FTP Root directory.

True

False

5. Indoor installation AP The power is generally () mW.

100

500

800

6. If changed AP The configuration parameters of the radio must be restarted AP The order can only take effect.

True

False

7. Which of the following rates is not 802.11a. The rate supported by the protocol ()?

6Mbps

12Mbps

24Mbps

30Mbps

8. Regarding the two major PoE standards, the following statement is incorrect (). (Select 2 Answers)

The

802.af standard was formulated in 2009, and the maximum output power is 30W

802.at supports four power levels and only supports Category 5 lines

802.af, also known as PoE+, can be compatible with 802.a devices

802.at, also known as PoE+, can be compatible with 802.a devices

9. After wireless users connect to the wireless signal point, they can’t get it IP Address, what are the possible reasons ()? (Select 2 Answers)

Where the user is VLAN No configuration DHCP server

wlan-ess No configuration on the virtual interface dhcp-enable

The authentication password specified by the user is incorrect

User equipment MAC The address has been added to the blacklist

10. Regarding the networking mode, the following description is correct ().

Compared with the three-layer network, the two-layer network is more suitable for large-scale networks such as parks and stadiums.

The advantage of the three-layer network is simple configuration and easy networking

if AC The ability to process data is relatively weak, it is recommended to use bypass networking

In a direct-connected network, AP Business data can not go through AC And directly reach the upstream network

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11. What are the general methods to solve co-channel interference (). (Select 3 Answers)

adjust AP Transmit power, adjust antenna feeder

Reasonable frequency reuse to ensure that the same channel does not appear in the same or adjacent coverage areas

Use omnidirectional antennas for coverage

Use obstacles for natural isolation

12. Which of the following descriptions of power splitters and couplers are correct is ().

Power divider and coupler are equal power distribution

The power divider is equal power distribution, and the coupler is unequal power distribution

The power divider is unequal power distribution, and the coupler is equal power distribution

Power divider and coupler are unequal power distribution

13. for dBm,dB,dBi, The following description is correct (). (Select 3 Answers)

dBm: Absolute value of characterizing power

dBi and dBd: Characterize the relative value of gain

dB The relative value of characterizing power

If the antenna of A is 12dBi, The second antenna is 14dBi, It can be said that A is smaller than B 2dBi

14. Which of the following are AP Factors to consider in capacity planning (). (Select 3 Answers)

Equipment performance

Number of concurrent users

Bandwidth requirement

Power supply type

15. SSID What is the Chinese name of ()?

Basic service set

Basic service area

Extended service set

Service set ID

16. Multi-floor deployment in a building AP When, the factor that needs attention is (). (Select 3 Answers)

The material of the wall

Other interference signals

In order not to affect the beauty, AP Should be hidden in the ceiling

Unified planning channel

17. In order to facilitate management and maintenance, AP The power supply mode is generally preferred to select () for power supply.

Independent power adapter

POE switch

POE adapter

AC power supply

18. for AC+ thin AP The network architecture, the following description is wrong ().

AP Can't work alone, need to be AC Centralized agent maintenance management

able to pass AC Enhance business QoS, Security and other functions

AP Zero configuration itself, suitable for large-scale networking

Must be achieved through the network management system AP And user management

19. If one 802.11n of AP support 2*2 of MIMO Technology, then this AP What is the theoretical rate of ()?

150 Mbps

300 Mbps

450 Mbps

600 Mbps

20. WLAN The signal passes through which of the following materials with less penetration loss (). (Select 2 Answers)

Gypsum board

Glass window (colorless)

Concrete wall

Brick wall

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21. Not loaded license Time AC6605 Supported by default AP The number is ().

22. CAPWAP The port number of the control message of the tunnel protocol is ().

1645

1646

5246

5247

23. 802.11g What rates can be supported?

1,2,5.5,11&6,9,12,18,24,30,36,48,54 Mbps

6, 9, 12, 18, 24, 36, 48, 54 Mbps

1,2,5.5,11&6,9,12,18,24,36,48,54 Mbps

6,9,12,18,24,30,36,48,54 Mbps

24. BSS Full name Basic Service Set,BSS It can be divided Independent BSS and Infrastructure BSS Two kinds.

True

False

25. At present, the security policy based on user authentication that is widely used in the enterprise network is () (Select 2 Answers)

WPA1 PSK+TKIP/CCMP

WPA1 802.1X+TKIP/CCMP

WPA2 PSK+TKIP/CCMP

WPA2 802.1X+TKIP/CCMP

26. Mesh Networking is defined in which of the following protocols ()?

802.11a

802.11g

802.11e

802.11s

27. Which of the following statements about region is correct ()? (Select 3 Answers)

APs belonging to the same region will uniformly adjust the radio frequency channel and power

An AP can belong to two regions at the same time, so that roaming is more optimized

If there is no configuration, all APs belong to region 0 by default

AP region has three types of deployment: dense deployment, discrete deployment, and ordinary deployment.

28. 2.4 GHz How many channels () can the frequency band be divided into at most?

29. CAPWAP Tunnel encapsulation AC The port number of the side data packet is5246, The control message port number is5247.

True

False

30. Which is the longest interval between 802.11 frames ()?

SIFS

IFS

DIFS

PIFS