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H12-311_V3.0 Exam Dumps - HCIA-WLAN V3.0

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Question # 57

Which of the following statements about antenna classification is correct ()? (Select 2 Answers)

A.

Classified by directivity: omnidirectional antenna, directional antenna, etc.

B.

Classified by shape: linear antenna, planar antenna, etc.

C.

Classified by purpose: short wave antenna, ultra short wave antenna, microwave antenna, etc.

D.

Classified by working frequency band: communication antenna, TV antenna, radar antenna, etc.

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Question # 58

Is the following statement about the introduction of frequency planning correct ()?

(Select 2 Answers)

A.

2.4GHz generally uses 1, 6, 11 three non-overlapping channels for coverage

B.

In China, 5GHz generally has 23 non-overlapping channels available

C.

Microwave interference will occur in the entire 2.4GHz frequency band

D.

If the AP is dual-band, it is recommended to use the 5G priority function

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Question # 59

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.

A.

True

B.

False

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Question # 60

In a dual-link backup network, AP According to what distinguishes the main use AC And spare AC of()?

(Select 3 Answers)

A.

priority

B.

AC of IP address

C.

AC Load condition

D.

AC response AP Time of day

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Question # 61

Which of the following statements about WLAN roaming are false?

A.

APs with which a STA is associated before and after roaming can work on different channels.

B.

During roaming, the STA sends an Association Request frame containing home AP information to the foreign AP.

C.

APs with which a STA is associated before and after roaming must work on the same channel.

D.

During roaming, the STA sends a Reassociation Request frame containing home AP information to the foreign AP.

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Question # 62

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

A.

True

B.

False

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Question # 63

dBm is a unit for measuring signal strength, and this can be converted into a value in mW. Which of the following unit conversions are true?

A.

3 dBm = 2 mW

B.

10 dBm = 20 mW

C.

0 dBm = 1 mW

D.

3 dBm = 3 mW

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Question # 64

CCMP Encryption ratio TKIP Encryption security is high because of ().

A.

Used longer IV

B.

Added a key distribution mechanism, no longer using a single key

C.

A more complex encryption algorithm is used

D.

Added message integrity check mechanism

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