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

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

Regarding the two major PoE standards, the following statement is incorrect ().

(Select 2 Answers)

if AP Work in infrastructure mode, then AP The working state at this time is full-duplex mode.

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.

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

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

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

Which of the following rates is not 802.11a. The rate supported by the protocol ()?

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

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.

For Huawei AC To create a user, first use aaa Command to enter the view.

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

For the following WLAN networking configuration, which statement is correct ().

(Select 3 Answers)

Which of the following AP Mode does not belong to WDS The internet()?

It can be connected with the antenna via ().

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)

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

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

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

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

If one wireless client connects to two AP identical SSID Next, what is used to determine which wireless terminal is connected to? ()?

AP

The distance between the center frequencies of the two channels is less than or equal to

In order to avoid adjacent channel interference during domain channel planning, the same channel is not allowed to be used.

25MHz When there is an overlapping area between the channels, there will be some interference, so in the adjacent area

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

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

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

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

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 standards are WiFi Developed by the alliance ()? (Select 2 Answers)

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

Radio frequency mainly uses spread spectrum technology. Which of the following technologies belong to spread spectrum technology ()? (Select 2 Answers)

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

controllers ()? (Select 3 Answers)

Huawei AC6605 What is the command to switch between the wired side and the wireless side ()?

exist 802.1X In the agreement, you must have () to be able to complete the authentication and authorization of the user. (Select 3 Answers)

Which of the following statements are true about a typical AP group?

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

(Select 2 Answers)

Each AC Equipment needs to be specified AC The source of IP Address for peace AP Establish CAPWAP Tunnel, one AC You can specify up to 2 Piece WLAN source IP.

Which of the following authentication modes belong to link authentication?

The following is for thin AP Is the description correct ()?

Which configuration methods does the wireless controller support ()?

(Select 3 Answers)

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

AP The size of the coverage area is controlled by ().

(Select 2 Answers)

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

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.

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

(Select 3 Answers)

Which of the following is a restart AC6605 The command()?

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

The AirEngine 5760-22W can be used as a wall plate AP or a remote unit (RU) in Huawei ' s Agile Distributed Wi-Fi Solution.

Which of the following are the relevant parameters of the Traffic template ().

(Select 2 Answers)

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

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

(Select 3 Answers)

In the WDS point-to-point network, the backbone link between Root AP and Leaf AP is connected in the 5GHz frequency band. The frequency band is 149. Which of the following frequency bands () should Leaf AP use?

AP The systematic process of radio frequency resource management is ().

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

Huawei AP The product can only support one configuration SSID .

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( ).

Which of the following statements is correct ()?

(Select 2 Answers)

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

(Select 3 Answers)

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

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.

exist WLAN Involved in the configuration VLAN What kinds of types are there ()?

(Select 3 Answers)

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

Which of the following descriptions of management VLAN is correct is ().

Which modulation method is the picture below ()?

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

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

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.

In the following options, () is not the main purpose of roaming.

DSSS The modulation methods used are BPSK and QPSK .

QoS What kinds of service models are included ()

(Select 3 Answers)

802.11 In the frame, it means that the wireless station AP When sending a signal, To DS and From DS What are the values of ()?

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

If the terminal supports 5GHz and 2.4GHz Function, then AP Can be configured to control this kind of terminal priority access 5GHz .

BSSID Is actually AP of MAC Address, used to identify AP Managed BSS .

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

< Quidway > display version

Huawei Versatile Routing Platform Software

VRP (R) software, Version 5.70 (AC6605 V200R001C00)

Copyright (C) 2003-2012 Huawei TECH CO., LTD

Quidway AC6605-PWR Routing Switch uptime is 0 week, 1 day, 23 hours, 33 minutes

H852V26S 0(Master): uptime is 0 week, 1 day, 23 hours, 33 minutes

512M bytes DDR Memory

128M bytes FLASH

Check the running status of the AC6605.

(Select 3 Answers)

WLAN AP It can be powered by ().

(Select 3 Answers)

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

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

For protection WLAN Security, which of the following measures can be taken? (Select 3 Answers)

If an SSID is incorrectly configured, STAs may not discover the target Wi-Fi. How do I modify the SSID to enable STAs to discover the target Wi-Fi?

The following figure shows the hardware structure of an AirEngine 5760-51. Which of the following statements is true?

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).

If connected to the same SSID Of wireless clients want to start from a AP Roam to another AP, Then two AP The area where the signal overlaps between. What is the general range ()?

Huawei Wireless Controller AC6605 Supports user access security management through security templates, and supports WAPI Four security strategies.

Point-to-point wireless bridges can be used to connect two networks located at different locations. In the wireless backbone connection, they are set to different channels. Root AP and Leaf AP Should be set

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

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.

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

AC6605 supports three ways to establish AP and AC intercommunication, what are the differences ()?

(Select 3 Answers)

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

If you want to create an open authentication security template, the following correct configuration is ().

After wireless users connect to the wireless signal point, they can’t get it IP Address, what are the possible reasons ()? (Select 2 Answers)

The lobe width is a very important parameter commonly used in directional antennas. It refers to the width of the antenna ' s radiation pattern below the peak (.)dB The angle of the premises

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

Regarding the networking mode, the following description is correct ().

AAA It is a management framework, which is commonly used to implement () protocol.

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?

WLAN What are the working frequency bands ()? (Select 2 Answers)

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