H12-311_V3.0 HCIA-WLAN V3.0 Questions and Answers

802.11b Support () channels in the United States, among which () channels do not overlap?

AP Transmit power 20dBm , Antenna gain 4dBi , Cable and device loss 1dB , Terminal receiving antenna gain 2dBi , Space propagation loss 80dB , Terminal receiving level RSSI= ().

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).

Defined WLAN Medium service quality 802.11 The agreement is ().

Which two of the following are PoE The power supply standard ()? (Select 2 Answers)

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

Which of the following options is the frequency range supported by China 5GHz Frequency band()?

WLAN middle,AP It has been working in a half-duplex state.

Which of the following options are 802.11b/g What are the differences between the agreements? (Select 3 Answers)

If an enterprise’s wireless network networking mode is direct forwarding, then thin and then transfer the message CAPWAP Encapsulate, pass CAPWAP The tunnel transmits this data message to AP can 802.11 Data messages are converted into Ethernet messages, AC.

802.11b is a protocol based on Orthogonal Frequency Division Multiplexing (OFDM for short) technology

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

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

In China, legally supported WLAN The frequency band has ().

(Select 2 Answers)

Which of the following are AP Factors to consider in capacity planning ().

(Select 3 Answers)

Basic service sets (BSSs) are basic WLAN units.

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

After one data frame is sent and confirmed, what is the time interval to wait before sending the next data frame ()?

According to the following output, the following statement is correct ().

display device

AC6605-26-PWR's Device status:

Slot Sub Type Online Power Register Status Role

-----------------------------------

0-AC6605-26 Present PowerOn Registered Normal Master

POWER Present PowerOn Registered Normal NA

(Select 2 Answers)

2.4 GHz What is the range of operating frequency specified by China ()?

Which of the following statements about Huawei's agile distributed Wi-Fi solution is false?

What is the initialization state of an AP before the AP establishes a link with an AC for the first time?

Regarding the functional characteristics of AP6010SN, which of the following statements is correct is ().

(Select 2 Answers)

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.

Huawei eSight Network management wizard-style configuration WLAN Business needs to be added in the network management first AC equipment.

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

display ap all Command can be viewed AP of MAC ,Type And running status.

Which of the following statements are correct () ? (Select 3 Answers)

(Select 3 Answers)

What was the name of the first radio communication network based on packet technology ()?

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

If a STA is associated with an SSID that is the same on two APs, which of the following is used to identify the AP to which a STA is connected?

Which of the following options is 802.11g The maximum rate supported by the protocol ()?

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

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

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

(Select 3 Answers)

If it is turned on on the switch PoE The function of this, you can no longer access traditional equipment on these interfaces.

exist PoE Terminology PSU Full name is Power Supply Unit , Refers to the power supply unit, such as PoE The Ethernet interface of the switch.

Perform connectivity test AP or AC Must be online.

CAPWAP Which of the following standards organization proposed the agreement ()?

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

Which of the following statements about Layer 2 and Layer 3 roaming are true?

An engineer takes an AP to a shopping mall for onsite WLAN surveying, with only a simple building map and no known obstacles. During onsite signal attenuation test, the AP works in ___ mode.

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

The following figure shows the WLAN topology of an enterprise. If the tunnel forwarding mode is used, which of the following paths may be used on the network?

support 5GHz What are the wireless LAN standards for frequency

bands ()? (Select 2 Answers)

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

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

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

(Select 2 Answers)

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

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

(Select 2 Answers)

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

When collecting fault information, you need to collect device logs, including ___ logs and ___ logs.

Drag the networking modes on the left to their corresponding characteristics on the right.

exist 1 Floor deployment 3 Piece AP, The channels from left to right are 1,6,11, At this time 2 Floor deployment 3 Piece AP Channel should be be divided into( ).

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

(Select 3 Answers)

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

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

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

802.11g What is the bandwidth of each channel of the frequency band ()?

The following pairs PSK The authentication description is wrong ().

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

AP Domain AP The deployment type does not include ().

Below does not belong AP The binding template is ().

When a hardware failure occurs in an AP in the network, in order to avoid data reconfiguration, the user can quickly complete the AP replacement by configuring the AP.

replace.

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

The equipment manufacturer can usually be judged according to the following ().

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

Among the following obstacles, () has the largest loss of wireless signals.

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

Huawei AP6310AP Outdoor type AP,can support WDS Function to realize the point-to-multipoint wireless bridging function.

The following description of the classification and functions of Huawei APs, the correct statement is ().

(Select 3 Answers)

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.

The wireless LAN architecture is mainly divided into controller-based thin

802.11 What parameters are used in the frame to reorganize the frame segment ()?

802.11g What rates can be supported?

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

AP able to pass POE The switch performs power supply and data transmission.

thin AP In the networking, which of the following authentication methods is not required in the authentication process AC participate().

original 802.11 What is the maximum rate supported by the protocol Mbps ()?

Indoor installation AP The power is generally () mW .

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

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.

Drag WLAN concepts on the left to their corresponding descriptions on the right.

The AirEngine 9700D-M is Huawei's next-generation Wi-Fi 6 AC.

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

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

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

STA issued 802.11 Message to pass AP When entering the Ethernet, it is converted to 802.3 Packets that are not in the priority mapping method are

().

because 802.11a The maximum rate supported is the same as 802.11g. The maximum rate supported is the same, so 802.11a Protocol is backward compatible 802.11g Agreement.

There are numerous methods of restarting a device. For example, onsite maintenance personnel can restart a device in cold restart mode, while remote maintenance personnel can restart a device only in ___ mode.

The following description of TKIP encryption is wrong ().

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

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.

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

Which of the following 2.4GHz The frequency bands are non-overlapping

channels (). (Select 3 Answers)

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

(Select 2 Answers)

Which of the following statements about WLAN roaming are false?

In an 802.11 frame, what kind of control message () should be sent by the terminal to obtain access to the wireless medium?