Practice Free H12-311_V3.0 HCIA-WLAN V3.0 Exam Questions Answers With Explanation

exist PoE Of terms, AP What does it belong to ()?

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

The following about SSID The statement is wrong ().

exist WLAN In the networking configuration, finally AC6605 What command must be executed to send the configuration to AP1 middle()?

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

A 10 Floors of buildings need to be covered WLAN Signal, because taking into account the floor block,

which can be set to 6 channel.

5,6 Layered WLAN Signal frequency

If the wireless client wants to pass AP Connected to WLAN , Then what is it through to connect to the wireless network ()?

The following description of TKIP encryption is wrong ().

Which of the following commands can be viewed AC Current configuration()?

Which of the following commands connect Huawei to the switch

802.11 The parameter used in the frame to check the integrity of the received frame is ()

antenna A The gain is 11dBi ,antenna B The gain is 8dBi , You can say the antenna A Than antenna B The gain is large ().

The two commonly used units to describe antenna gain are dBi and dBd , The conversion relationship between them is: dBi=dBd+2.14 .

according to AP and AC The inter-network architecture can divide the networking mode into two-tier networking and three-tier networking.

Which of the following technologies work at 5 GHz ()? (Select 2 Answers)

Which of the following commands can be used to clear counter statistics?

In a large wireless network deployment scenario, AC When configured to "Layer 3 networking + bypass mode + direct forwarding", the gateway of the wireless user should. Where is it located ()?

Which of the following statements about establishing CAPWAP control and data tunnels are false?

Compared with 802.11a/b/g, the technical advantages of 802.11n include which of the following aspects ()?

Among the following options, () is a prerequisite for enabling Huawei's load balancing function.

According to the different signal parameters controlled, what modulation methods can be divided into ()? (Select 3 Answers)

Which of the following commands is not necessarily run in the WLAN view?

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.

Which of the following ports can only belong to 1 Piece VLAN ().

Barker Code is a 11 Bit sequence (e.g. 10110111000 ), there are advantages in wireless transmission, which can effectively reduce interference, but it reduces efficiency.

Same user VLAN And the same SSID All wireless users can access the Internet, but they can’t access each other. What may be the cause of this phenomenon ()?

The following transmission rate can reach 54Mbps What are the wireless LAN standards and above ()? (Select 3 Answers)

Which of the following statements about region is correct ()?

(Select 3 Answers)

The following command can configure the port of the Huawei switch as hybrid model()?

Antennas are classified according to directivity and can be divided into () antennas and () antennas.

(Select 2 Answers)

Which of the following types of frames does a STA send to obtain surrounding wireless network information during active scanning?

How many management nodes () does eSight Standard Edition support at most?

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

(Select 3 Answers)

The following description about dual-link backup networking is incorrect ()

Which of the following factors need to be taken into account when selecting a device in WLAN planning?

About Huawei WLAN Description of the characteristics of the product, the following statement is correct ().

What are the prerequisites for users to achieve three-tier roaming ()?

(Select 3 Answers)

exist WDS In the deployment, what kinds of bridge networking modes are included ()? (Select 3 Answers)

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

Terminal is different VLAN The roaming within belongs to ().

The basic service set is 802.11 The basic components of a network are composed of a group of workstations that communicate with each other.

By default, Huawei WLAN devices can implement intra-AC Layer 2 roaming without any configurations.

CAPWAP The agreement is made by IEEE Standards organization in 2009 year 4 One of the month WLAN Standard for AC And thin AP Communication between.

Which of the following is IEEE A wireless local area network standard originally formulated ()?

802.11 In the frame, RTS and CTS What is the interframe interval between ()?

Which of the following options are the basic functions of configuring Huawei wireless

controllers ()? (Select 3 Answers)

and 802.11a/b/g The standards are different, 802.11n Protocol is dual-frequency working mode (support 2.4GHz and 5GHz Two working frequency bands).

Which technology belongs to the wireless metropolitan area network () below?

Which of the following modes can be used to upgrade Huawei APs?

In a point-to-multipoint networking environment, one device serves as the central device, and all other devices only establish wireless bridges with the central device to realize the interconnection of multiple networks. The disadvantage is that the intercommunication of multiple branch networks must be forwarded through the central bridge device.

Which of the following 802.11 control frames is sent by a STA to acquire the right to the wireless medium?

WLAN The commonly used radio frequency cables in the system are (). (Select 3 Answers)

IEEE 802.11 The standard used to define roaming is ().

For shared key authentication, the error described below is ().

exist WDS In the networking, it is connected to AC connected AP What is usually called ()?

AP There are several types of domain deployment (). (Select 3 Answers)

The omnidirectional antenna appears on the horizontal pattern as ()Spend.

PPPoE Certified in WLAN When used, and WLAN The authentication encryption used by itself does not matter.

AC What is the function in the wireless network()? (Select 3 Answers)

for dBm ,dB,dBi, The following description is correct ().

(Select 3 Answers)

802.11 In the frame, it is used to record the network allocation vector ( NAVWhat is the value of ()?

For outdoor long-distance point-to-point backhaul, the antenna of () should be selected.

If a AP Has been added offline, then AP You can go online directly.

As a guarantee WLAN There will be no interference between the various channels of the network, which of the following frequency bands belong to China5.8GHz Use frequency band()? (Select 2 Answers)

802.11n exist 20M How many sub-carriers can be used to transmit data in the mode ()?

802.11 There are three frame types, namely (). (Select 3 Answers)

User number 300 People, concurrency rate 70% , Terminal support 2.4GHz and 5GHz Frequency band, in accordance with each AP Maximum number of dual-band access users40 people

Consider, need at least () AP Able to meet capacity requirements?

MIMO The antenna configuration is usually expressed as " M*N ",in M and N What does each mean ()?

(Select 2 Answers)

The following figure shows the WLAN topology of an enterprise. If the direct forwarding mode is used without taking policy-based routing into account, which of the following paths may be used on the network?

AP If you want to pass DNS Server fetch AC of IP Address, first get your own IP address,DHCP Server and DNS of IP address.

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

WLAN When configuring the network, WMM Which of the following templates should the template be bound to ()?

802.11 In the frame, Address Which address bit represents the address of the receiving end of the frame ()?

There are four wireless STA, According to the following backoff time parameters, which workstation has the priority to occupy the channel?

When coverage area 2.4GHz Frequency band 1 When channel interference is large and severe, adjust the device to 3 Channel, can effectively reduce interference.

Which of the following protocols support 2.4GHz Frequency band()? (Select 3 Answers)

original 802.11 What is the working frequency band used by the agreement ()?

China in 2.4GHz How many channels does the frequency band support ()?

Which of the following statements about WLAN roaming are false?

After deploying a WLAN, an engineer finds that the corresponding SSIDs cannot be discovered and suspects that some APs failed to go online. To query the APs that have gone online on the AC, the engineer can run the ___ command.

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

The 802.11 physical layer standard defines some common operations on the physical layer of wireless networks: such as QoS, security, and roaming operations.

802.11 Wireless LAN CSMA/CA Which of the following are included in the mechanism ()? (Select 3 Answers)

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

Telnet is one of the ways to manage AP remotely. Telnet authentication based on username and password can be realized through configuration.

What are China's mandatory standards for wireless LAN security ()?

about 5G The working principle of priority, the following statement is correct ().

if AP The transmit power is 1mW , Converted to dBm After () dBm.

1024-QAM technology allows each subcarrier to carry __ bits.

Among the following options, () is the reason for using 5G priority access.

Metal objects have a greater attenuation effect on wireless signals, AP Or the antenna should not be placed behind a metal ceiling, etc.

Huawei Wireless Controller AC6605 The upgrade operation can only be performed on the wired side of the controller.

The following Huawei AP Which AP support SFP Fiber interface()?

Which of the following devices belong to Huawei Wireless Dual Band AP(Access Point )?

(Select 2 Answers)

WLAN AP It can be powered by ().

(Select 3 Answers)

Spread spectrum ( spread-spectrum ) Technology is to use ISM The basis of frequency band transmission of wireless data.