For the choice of WLAN coverage antennas, it is recommended to choose () for long and narrow areas, and () for wide and short-distance areas.

Directional antenna; omnidirectional antenna

Omnidirectional antenna; Omnidirectional antenna

Omnidirectional antenna; directional antenna

Directional antenna; omnidirectional antenna

Directional antenna; Directional antenna

For outdoor WLAN Cover, the following statement is correct ().(Select 3 Answers)

The higher the antenna gain, the stronger the antenna directivity, and the weaker the radiation gain directly below the antenna

The feeder interface must match the selected antenna

Outdoor antennas should not blindly pursue high gain

The higher the antenna gain, the stronger the antenna directivity, and the weaker the radiation gain directly below the antenna

The feeder interface must match the selected antenna

The length of the feeder must not exceed 2 rice

Outdoor antennas should not blindly pursue high gain

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

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

The antenna gains gain through ().

Make the antenna radiation more concentrated

Use power amplifiers in antenna systems

Make the antenna radiation more concentrated

Use high-efficiency antenna feeder

Use equipment with low standing wave ratio

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

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

Single area WLAN When planning, influence AP The factors of the number of deployment are ().(Select 3 Answers)

Number of people connected in the area

Field strength and bandwidth requirements

Number of people connected in the area

Field strength and bandwidth requirements

Wireless network engineer WLAN When planning the network, use RF The purpose of simul-ation is (). (Select 3 Answers)

Analog signal coverage effect, find blind spots

Obtain the field strength distribution of different locations

Get the current signal-to-noise ratio of different locations

Analog signal coverage effect, find blind spots

Obtain the field strength distribution of different locations

Get the current signal-to-noise ratio of different locations

Get available bandwidth in different locations

Which of the following functions does the Huawei WLAN planning tool have ()?(Select 3 Answers)

Support the division of general coverage areas and key coverage areas

Support automatic deployment of AP locations

Support exporting standardized WLAN planning reports

Support automatic identification of obstacles

Support the division of general coverage areas and key coverage areas

Support automatic deployment of AP locations

Support exporting standardized WLAN planning reports

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 obstacles for natural isolation

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

AP Unavailable IP Common reasons for addresses are (). (Select 3 Answers)

Incorrect address pool configuration

For the polarization of electromagnetic waves, which of the following descriptions is correct is (). (Select 3 Answers)

The antenna radiates electromagnetic waves to the surrounding space

If the electric field direction of the electric wave is perpendicular to the ground, we call it a vertically polarized wave

If the transmitting antenna is circularly polarized, the receiving antenna must also be circularly polarized, and the polarization direction of the two must be the same.

The antenna radiates electromagnetic waves to the surrounding space

The polarization of the antenna refers to the direction of the magnetic field strength formed when the antenna radiates , The direction of the electric field changes according to a certain rule

If the electric field direction of the electric wave is perpendicular to the ground, we call it a vertically polarized wave

If the transmitting antenna is circularly polarized, the receiving antenna must also be circularly polarized, and the polarization direction of the two must be the same.

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

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

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

For indoor distributed APs, which of the following descriptions is correct is ().

Can be deployed in conjunction with the operator's 3G network

AP6310SN supports dual frequency mode

AP What are the reasons for being unable to go online ()?(Select 3 Answers)

DHCP Incorrect address pool configuration AP Unable to get address

AP Use static discovery, but AC of IP Configuration error

AP Version with AC Inconsistent versions

DHCP Incorrect address pool configuration AP Unable to get address

AP Use static discovery, but AC of IP Configuration error

AP Version with AC Inconsistent versions

The controller uses no-auth Authentication mode

Which configuration methods does the wireless controller support ()?(Select 3 Answers)

pass through eSight Configuration

A large number of devices appear AP and AC How to deal with the version mismatch failure ().

Upgrade the versions to match each other

an examination POE Is the power supply normal

Huawei H12-311_V3.0 Practice Test 7 - Free Online Exam Prep & Questions

If there is a high demand for WLAN capacity in a coverage area, the construction method of () should be considered.

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Huawei H12-311_V3.0 Practice Test 7

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