Updated Nov-2022 H12-311_V3.0 Free Exam Files Downloaded Instantly [Q127-Q149] : IT Certification Exam Braindumps : http://blog.braindumpsit.com

QUESTION 127
exist WDS In the networking, it is connected to AC connected AP What is usually called ()?

Leaf AP

Middle AP

Master AP

Root AP

QUESTION 128
After one data frame is sent and confirmed, what is the time interval to wait before sending the next data frame ()?

SIFS

IFS

DIFS

PIFS

QUESTION 129
Defined WLAN Medium service quality 802.11 The agreement is ().

802.11f

802.11i

802.11e

802.11n

QUESTION 130
According to the following output, the following statement is correct ().
<Quidway> 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)

The user is currently operating on the wired side of the AC

The user is currently operating on the wireless side of the AC

According to the output, it can be concluded that the AC6605 uses a POE power supply module

To implement the related configuration of WLAN, the user must first switch to the wireless side by CTRL+Ypass

QUESTION 131
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 ()?

Configured on the user’s gateway device ACL , Which prevents mutual access between users

AC Configured on ACL , Which prevents mutual access between users

Access AP Port isolation configured on the switch prevents mutual access between users

wireless service-set User isolation is configured on the computer to prevent mutual access between users

QUESTION 132
Terminal is different VLAN The roaming within belongs to ().

Seamless AP roaming

Two-tier roaming

Three-tier roaming

Four-tier roaming

QUESTION 133
WLAN AP It can be powered by ().
(Select 3 Answers)

POE switch

POE switcher

Independent power adapter

RF cable

QUESTION 134
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

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.

QUESTION 135
WLAN The commonly used radio frequency cables in the system are (). (Select 3 Answers)

RG-8 Jumper

1/2 “(Inch) Super flexible feeder

1/2 “(Inch) feeder

13/8 “(Inch) feeder

QUESTION 136
AAA It is a management framework, which is commonly used to implement () protocol.

RADIUS

CAPWAP

802.11a/b/g/n

802.1X

QUESTION 137
Among the following options, () is a prerequisite for enabling Huawei’s load balancing function.

AP Belong to the same type

AP In the same AC Under management, and AP Signal overlap

STA Can scan to each other for load balancing AP

AP The output power settings are the same

QUESTION 138
To obtain better coverage, try to use AP Signal can ( ) Through the wall.

vertical

parallel

45°

60°

QUESTION 139
802.11a What kind of technology is used to implement the agreement?

FHSS

DSSS

OFDM

MIMO

QUESTION 140
In the following options, () is not the main purpose of roaming.

Avoid long authentication time during roaming, resulting in packet loss or even business interruption

Ensure that the user authorization information remains unchanged

Guarantee users IP The address remains unchanged

Ensure that the user’s network rate remains unchanged

QUESTION 141
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( ).

1 ,6,11

2 ,7,12

6 ,11,1

11 ,6,1

QUESTION 142
Which of the following wireless frames are control frames ()? (Select 3 Answers)

Beacon

RTS

CTS

PS-Poll

QUESTION 143
802.11n Standard uses dual band (2.4GHz and 5GHz ), the theoretical transmission rate can reach up to 300Mbps, The actual test rate can reach arrive 100Mbps above.

True

False

QUESTION 144
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

Get available bandwidth in different locations

QUESTION 145
For shared key authentication, the error described below is ().

After adopting shared key authentication, you must use WEP Encryption

The shared secret requires users and AP Use the same shared secret

For skinny AP, The shared key is preset in AC middle

The disadvantages of shared keys are poor scalability and not very secure

QUESTION 146
2.4 GHz What is the distance between the center frequencies of the channels in the frequency band ()?

20 MHz

22 MHz

5 MHz

10 MHz

QUESTION 147
The following statement is correct ().
(Select 3 Answers)

WPA2 PSK authentication requires the user to enter a user name and password to connect

When the user performs web authentication, it is triggered by the user’s http message after successfully obtaining the IP address; at this time, it is forcibly redirected to the portal server, Go through the certification process

WPA2 uses 802.1X authentication

WAPI is China’s national standard system for wireless LAN

QUESTION 148
WDS Technology improves the flexibility and convenience of the entire network structure, but it can only support point-to-point working mode.

True

False

QUESTION 149
If the wireless client wants to pass AP Connected to WLAN , Then what is it through to connect to the wireless network ()?

SSID

IBSS

BSID

BSA