Huawei H12-311_V3.0 Exam Questions Free Practice Test

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Questions # 41:

In the following description of WEP encryption, the error is ().

Options:

WEP encryption uses a stream encryption algorithm

WEP encryption adds IV to destroy the regularity of the key

The length of IV in WEP encryption is 48 bits

WEP encryption allows the device to store four keys at the same time

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Questions # 42:

By multiple AP And the infrastructure mode network composed of distributed systems connecting them, also called what ()?

Options:

Basic service set

Basic service area

Extended service set

Extended service area

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Questions # 43:

WLAN security policies are configured in security profiles. As such, WPA/WPA2 PPSK must be configured in the security profiles.

Options:

True

False

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Questions # 44:

ETSI Which country or region is the standards organization ()?

Options:

China

America

Japan

Europe

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Questions # 45:

when AC When it is a bypass networking, if the data is forwarded directly, then the data flow () flow () AC. AC; If the data is in tunnel forwarding mode, the data

Options:

Don't go through

Don't pass, don't pass

Pass by

Pass, not pass

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Questions # 46:

802.11b Which channels in the protocol do not overlap each other()? (Select 3 Answers)

Options:

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Questions # 47:

Which modulation method is the picture below ()?

Options:

phase modulation

Wave modulation

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Questions # 48:

According to the 802.11 random backoff mechanism, the backoff time must be an integer that is a multiple of the timeslot time.

Options:

True

False

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Questions # 49:

To the following WLAN In the description of the network diagram, the error is ().

Options:

The picture shows the bypass networking

Can be configured and managed on the access switch VLAN of PVIDA.

can use AC As DHCP Server ,give AP distribute IP address

You cannot use the aggregation switch to STA distribute IP address

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Questions # 50:

For the lobe width, which of the following descriptions is correct is (). (Select 3 Answers)

Options:

Within the range of the main lobe, the power density relative to the maximum radiation direction is reduced by half (3dB) Angle

The narrower the lobe width, the better the directivity, the longer the radiation distance, the stronger the anti-interference ability

The pattern usually has two or more lobes

Only within the coverage of the half power angle, the terminal can receive the signal

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