H12-311_V3.0 Sample Questions Answers

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

().

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

BSS Which two basic service sets are included ()? (Select 2 Answers)

Among the following priority queues, the () queue has the highest default priority.

Capacity planning mainly starts from the aspects of equipment performance, number of users, bandwidth requirements, and wireless environment, and estimates the amount required to meet the business volume. AP number

quantity.

AC Perform the load balancing process according to () information.

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

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.

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

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

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.

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.

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

In huawei eSight The maximum number of layers supported by the location topology in the network management system is layer ().

MIMO(Multiple input and multiple output) The client can use at most 3 Two spatial streams transmit data at the same time, and the maximum theoretical rate can reach , That is, multiple input and multiple output, using 600Mbps . 802.11n Technology wireless access point and guest

The antenna gains gain through ().

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.

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 ()?

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

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

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.

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

(Select 3 Answers)

thin AP Find AC In the process, the first step is AP Check if there is pre-configured static AC of IP List.

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

(Select 2 Answers)

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

TKIP Encryption ratio WEP Encryption security is high because of (). (Select 3 Answers)

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

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

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

channels (). (Select 3 Answers)

an examination AP What is the command of the running system version ()?

an examination AC What is the command for online users ()?

What frame does the wireless client passively scan to obtain the surrounding wireless network information ()?

Which of the following agreements are IEEE customized 802.11 standard() ? (Select 3 Answers)

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

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

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

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 ()?

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

In the direct-connected networking solution, AP and AC Establish CAPWAP Tunnel, the management flow must be encapsulated in CAPWAP In the tunnel, data service

The stream can be optionally encapsulated in CAPWAP In the tunnel.

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 ().

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

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

802.11a What kind of technology is used to implement the agreement?

Configure the security policy of the wireless network as WEP , You need to AC6605 The security template is configured as follows ().

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

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( ).

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

Which of the following standards organizations implements WLAN technical interoperability for WLAN equipment certification ()?

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

The following statement about the AP access control method is incorrect ().

(Select 2 Answers)

WDS Technology improves the flexibility and convenience of the entire network structure, but it can only support point-to-point working mode.

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

eSight The network management is Huawei's dedicated network management platform, but it can only manage Huawei's own equipment.

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

(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

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

WLAN The signal passes through which of the following materials with less penetration loss (). (Select 2 Answers)

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

single AP What is the area covered ()?

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

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)

for CAPWAP Agreement, the error described below is ().

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

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

WEP The encrypted data algorithm uses () algorithm.

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

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

The following () service model can provide end-to-end QoS services, but the scalability is not good.

The gain of the antenna can be explained ().

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

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

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

(Select 3 Answers)

What series of Huawei switches () is the Huawei plug-in controller ACU board suitable for?

(Select 3 Answers)

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

for AC6605 , The following command () can be used to view AP Is it online?

802.11 In the frame, STA Which type of frame () does the association request and authentication request belong to?

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)

TKIP encrypted IV the length of the vector is () bit.

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

Mesh Networking is defined in which of the following protocols ()?

Which of the following options belong EDCA Parameters? (Select 2 Answers)

At present, the security policy based on user authentication that is widely used in the enterprise

network is () (Select 2 Answers)

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

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

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

DSSS The modulation methods used are BPSK and QPSK .