Huawei H12-311_V3 0-ENU Exam Updated Questions

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Full version: H12-311_V3.0-ENU Exam Dumps Questions
1. The security strategy based on user authentication widely used in enterprise networks is ().
(Multiple choice)
A. WPA1PSK+TKIP/CCMP
B. WPA1 802.1X+TKIP/CCMP
C. WPA2 PSK+TKIP/CCMP
D. WPA2 802.1X+TKIP/CCMP
Answer: BD
2. In mesh MESH networking, which of the following descriptions about MESH paths is correct?
(Multiple choice)
A. There is only one MESH path
B. A wireless link formed by cascading a series of MESH connections between the source MP and
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the destination MP
C. There may be multiple MESH paths
D. In the MESH path, the source AP can be MP or MPP
Answer: BCD
3. In the WLAN network, which of the following illegal attack detection needs the support of the
dynamic blacklist function? (Multiple choice)
A. Flood attack detection
B. Spoof attack detection
C. Weak lV attack detection
D. Anti-brute force cracking
Answer: AD
4. Regarding AP6610DN, which of the following statement is wrong?
A. AP6610DN is an enhanced outdoor AP
B. AP6610DN is a dual-band AP, in which the 5GHz band can be used for both wireless bridging and
user access
C. AP6610 has only one Ethernet interface with a maximum bandwidth of 1000M
D. AP66010DN supports Ethernet interface and optical fiber interface at the same time
Answer: C
5. The modulation methods adopted by DSSS are BPSK and QPSK respectively.
A. True
B. False
Answer: A
6. Which of the following command can view the current version information?
A. display interface
B. display current-configuration
C. display ap all
D. display version
Answer: D
7. An engineer was unable to establish a connection with the AD server during the process of
configuring Agile Controller. The engineer checked that the IP address of the AD directory server and
the synchronization account and password were correct, and did not perform additional configuration
on the AD directory server. The specific configuration is shown in the figure below. What is the cause
of this problem? (Multiple choice)
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A. Synchronization type error
B. Authentication source name error
C. Terminal error
D. Base DN error
E. SSL is not enabled
Answer: CD
8. There are many video conferences in large companies, and QoS generally adopts which of the
following service model?
A. Best Effort model
B. IntServ Model
C. FIFO model
D. DiffServ model
Answer: C
9. The index used to describe the degree of concentration of the antenna on the transmission power
is ().
A. Broadband
B. Power
C. Gain
D. Polarity
Answer: C
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10. In smart roaming, a terminal that supports 802.11k can actively collect surrounding neighbor AP
information and report it to the associated AP.
A. True
B. False
Answer: A
11. A 10-story building needs to cover WLAN signals, because considering the floor blocking, the
signal frequency of WLAN on the 5th and 6th floors can be set to 6 channels at the same time.
A. True
B. False
Answer: B
12. In order to protect WLAN security, which of the following measures can be taken? (Multiple
choice)
A. Authentication
B. Encryption
C. System Protection
D. Control flow
Answer: ABC
13. Which of the following modes does Huawei RF tuning support? (Multiple choice)
A. Automatic mode
B. Timing mode
C. Manual mode
D. Adaptive mode
Answer: ABC
14. Which of the following commands can configure the port of the Huawei switch to hybrid mode?
A. swichport hybrid
B. hybrid enable
C. port link-type hybrid
D. port mode hybrid
Answer: C
15. When a data frame is sent and confirmed, what is the time interval before the next data frame is
sent?
A. SIFS
B. IFS
C. DIFS
D. PIFS
Answer: C
16. The power of AP installed indoors is generally () mW.
A. 100
B. 500
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C.800
D.50
Answer: A
17.What types of routing protocols does the HWMP protocol support? (Multiple choice)
A. pro-active
B. OSPF
C. on-demand
D. IGRP
Answer: AC
18. Regarding the default configuration of common parameters of dual-link cold backup, which of the
following statements is correct?
A. AC global priority is 0
B. AC personality priority is 0
C. The dual-link backup switchback function is not enabled
D. Enable dual-link backup function
Answer: A
19. Which of the following benefits can intelligent roaming bring? (Multiple choice)
A. Improve the service experience of the terminal itself and the overall performance of the wireless
channel
B. Improve wireless channel performance
C. Load balancing
D. Spectrum Navigation
Answer: ABC
20. In the dual-link backup technology, which of the following descriptions about the master-slave AC
election is correct? (Multiple choice)
A. In the case of the same load, compare the IP addresses, and the one with the larger l address is
the master.
B. Compare the priority of the AC, the one with the higher priority value is the master AC
C. Prioritize the selection of the AC with the largest number of currently accessible APs as the main
AC. If the current number of accessible APs is the same, select the AC with the largest number of
currently accessible 5A as the main AC.
D. In the case of the same priority, compare the load of AC equipment, that is, the number of A and
the number of SA, and the light load is the main AC
Answer: CD
21. A certain type of AP is configured with multiple antennas on the 5G radio frequency. In order to
make full use of the airspace resources of the antennas to communicate with multiple STAs at the
same time, both the AP and the STA must support and enable the __ function.
Answer: MIMO
22. If roaming is implemented between two APs, which of the following conditions must be met?
(Multiple choice)
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A. Same security policy
B. Same SSID
C. The same data forwarding mode
D. The same service VLAN
Answer: ABC
23. The CAPWAP protocol supports two working modes: Split Mac and Local Mac.
A. True
B. False
Answer: A
24. Which user identity data systems does Agile Controller support? (Multiple choice)
A. Ordinary account creation
B. Third-Party Authentication System
C. Digital certificates
D. MAC bypass authentication
Answer: ABC
25. When installing a long-distance point-to-point radio frequency communication link, if the distance
between the transmitting and receiving antennas exceeds how many kilometers, the influence of the
curvature of the earth needs to be considered?
A. 3.3km
B. 5.3km
C.7.3km
D. 11.3km
Answer: D
26. The electrical performance indicators of the antenna include (). (Multiple choice)
A. Gain
B. Lobe Width
C. Power size
D. Polarization
Answer: ABD
27. When a large enterprise deploys WLAN layer 3 networking, it is necessary to configure the Option
43 field on the Windows 2003 DHCP Server to notify the AP of the AC's IP address.
The IP address of the AC is 10.23.100.1. Which of the following should be configured in the Option 43
field on the JDHCP Server?
A. 030831302E32332E3130302E31
B. 040831302E32332E3130302E31
C. 030B31302E32332E3130302E31
D. 030B31302E32332E31302E3031
Answer: C
28. The upgrade operation of Huawei wireless controller AC6605 can only be performed on the wired
side of the controller.
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B. False
Answer: A
29. 802.11 has three frame types, which of the following are correct? (Multiple choice)
A. Data frame
B. Control frame
C. Business frame
D. Management frame
Answer: ABD
30. The AP deployment type in the AP domain, which of the following does not include?
A. Normal deployment
B. Arranged in an orderly manner
C. Discrete deployment
D. Dense deployment
Answer: B
31. AP can provide power supply and data transmission through POE switch.
A. True
B. False
Answer: A
32. In China, which of the following WLAN frequency bands are supported by regulations? (Multiple
choice)
A. 2.4-2.4835GHz
B. 5.15-5.25GHz
C. 5.25-5.35GHz
D. 5.725-5.850GHz
Answer: AD
33. Which of the following statements are correct? (Multiple choice)
A. WDS can transmit the data of the wired network through the relay structure of the wireless
network, so that the network data can be transmitted to another wireless network environment or
another wired network.
B. The wireless network bridging function usually refers to one-to-one, but the WDS architecture can
do one-to-many.
C. WDS can allow wireless APs to bridge (relay) wirelessly, but the bridged wireless APs cannot
provide coverage at the same time.
D. Because a virtual network line is formed through a wireless network, WDS is also called a wireless
network bridging function.
Answer: ABD
34. For outdoor WLAN coverage, which of the following expressions is correct? (Multiple choice)
A. The higher the antenna gain, the stronger the directivity of the antenna, and the weaker the
radiation gain directly below the antenna
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B. The feeder interface must match the selected antenna
C. The length of the feeder must not exceed 2 meters
D. Outdoor antennas should not blindly pursue high gain
Answer: ABD
35. When channel 1 of the 2.4GHz frequency band in the coverage area has a lot of interference and
is serious, adjusting the device to channel 3 can effectively reduce interference.
A. True
B. False
Answer: B
36. An infrastructure mode network consisting of multiple APs and the distributed systems connecting
them, also known as which one?
A. Basic service set
B. Essential service area
C. Extended service set
D. Expanded service area
Answer: C
37. Which of the following belongs to the category of directional antennas? (Multiple choice)
A. Off-board cross-polarized antenna
B. Panel directional antenna
C. Panel Omnidirectional Antenna
D. Plate type cross-polarized antenna
Answer: ABD
38. As shown in the figure, which AP and STA in the figure cannot perform normal data
communication? (Multiple choice)
A. AP1 and STA1
B. AP1 and STA2
C. AP2 and STA1
D. AP2 and STA2
Answer: ACD
39. Which of the following implementation methods does CAC have? (Multiple choice)
A. Based on channel utilization
B. Based on the number of users
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C. Based on terminal SNR
D. Based on AP number
Answer: ABC
40. If the AP wants to obtain the IP address of the AC through the DNS server, it must first obtain its
own IP address, DHCP Server and DNS IP addresses.
A. True
B. False
Answer: A
41. In AP-based load balancing, which description is correct about the dynamic load balancing?
(Multiple choice)
A. Dynamic load balancing solves the problem of limited number of members in static load balancing
B. Number of members for dynamic load balancing and members for static load balancing
C. Each member in the balancing group of dynamic load balancing is automatically configured or can
be a different frequency band
D. Each member in the balancing group of dynamic load balancing can be automatically configured
but must be in the same frequency band
Answer: AC
42. The two commonly used units to describe antenna gain are dBi and dBd, and the conversion
relationship between them is: dBi=dBd+2.14.
A. True
B. False
Answer: B
43. Which of the following materials does the WLAN signal have less penetration loss? (Multiple
choice)
A. Gypsum board
B. Glass window (colorless)
C. Concrete walls
D. brick wall
Answer: AB
44. What is the VLAN which used to establish a CAPWAP tunnel VLAN for AP and AC?
A. Management VLAN
B. Service VLAN
C. User VLAN
D. Authentication VLAN
Answer: A
45. Regarding the Agile Controller access model, which of the following descriptions is correct?
(Multiple choice)
A. In the access model, the core is authorization conditions and authorization results
B. Currently only 802.1x and Portal authentication can support all conditions in the access model
C. Authorization elements do not include IP address ranges
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D. Authorization conditions include authorization elements
Answer: ABD
46. What is the range of working frequency stipulated in 2.4 GHz band?
A. 2.4GHz-2.4835GHz
B. 2.471GHz-2.497GHz
C. 2.4465GHz-2.4835GHz
D. 2.445GHz-2.475GHz
Answer: A
47. Global tuning, the AC runs () and () algorithms based on neighbor relationship, interference, and
load information to generate a new transmit power and working channel for the AP, and then sends
them to the AP for use. (Multiple choice)
A. EDCA
B. DCA
C. CAC
D.TPC
Answer: BD
48. Which of the following wireless frames are control frames? (Multiple choice)
A. Beacon
B.RTS
CC TS
D.PS-Poll
Answer: BCD
49. In the WLAN network environment with the WIDS function enabled, the MAC addresses of the
detected AP devices include: 01-01-22-22-33-33
02-01-01-22-33-3302-01-01-22-33-3402-01-22-01-01-22
The configured oui whitelist is 01-01-22; which of the above are illegal APs? (Multiple choice)
A. 01-01-22-22-33-33
B. 02-01-01-22-33-33
C. 02-01-01-22-33-34
D. 02-01-22-01-01-22
Answer: BCD
50. The AP periodically sends Discovery Request messages to check the status of the original
primary link. When the link recovers, the AP detects that the priority level of the link is higher than that
of the current primary link, and triggers a switchback. In order to avoid frequent switching caused by
network vibration, after waiting for 6 echo cycles, the AC is notified to perform active/standby
simultaneous switching, and at the same time, the AP sends the data services of the STAs to the
newly upgraded AC.
A. True
B. False
Answer: B
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51. In a large-scale wireless network deployment scenario, when the AC is configured as "three-layer
networking + bypass mode + direct forwarding", where should the wireless user's gateway be
located?
A. On a Layer 3 switch at the aggregation layer
B. On a one-arm router
C. On the AC
D. On the AP
Answer: A
52. Regarding the use scenarios and characteristics of various ACs, which of the following
descriptions is correct? (Multiple choice)
A. Standalone AC single boards such as ACU2 are suitable for large-scale networks, there will be
expansion requirements in the future, and scenarios where rack slot resources are tight
B. Independent box AC such as AC6605 is suitable for the unified construction of wired and wireless
networks, and the unified management of wired and wireless users
C. A native AC such as an X1E board is suitable for scenarios where wired and wireless users are
independently managed
D. With the board AC such as X1E single board, compared with independent AC such as AC6605, it
has higher forwarding performance, and can achieve device-level and link-level redundant backup;
make the WLAN network have better reliability
Answer: AD
53. Which of the following commands can be used to view the role of Mesh?
A. display wlan mes route
B. display ap-system-profile
C. display mesh-profile
D. display mesh vap
Answer: B
54. In the N+1 backup scenario, which of the following statements about the active/standby
switchover function is correct? (Multiple choice)
A. By default, the global switchback function of the standby AC is enabled.
B. By default, the global switchback function of the standby AC is disabled
C. The N+1 backup scenario does not support the backup AC to turn offthe active/standby switch.
D. In N+1 backup scenario, the backup AC is supported to turn off the active/standby switching
function.
Answer: AD
55. What parameters are used in 802.11 frames to reassemble frame segments?
A. Frame Control
B.Duration
C. Address bit
D. Fragment number
Answer: D
56. Which of the following descriptions about load balancing between dual frequencies is correct?
(Multiple choice)
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A. When the load difference between 5G and 2.4G radios is within the balance threshold, the AP will
guide the terminal to associate with 5G first.
B. When the load on the 5G radio exceeds the balance threshold of 2.4G, the AP will guide the
terminal to associate with 2.4G first.
C. When the load on the 5G radio frequency exceeds the balance threshold of 2.4G, if the terminal is
associated with 5G, the AP will always refuse the terminal association until the terminal is associated
with 2.4G
D. If the load balancing difference threshold between dual-frequency is configured as 10, it means
that if and only when the number of terminals on the 5G radio exceeds 2.4G radio by more than 10,
the load between the dual-frequency is considered unbalanced
Answer: AB
57.WLAN AP can be powered by (). (Multiple choice)
A. POE switch
B. POE adapter
C. Independent power adapter
D. RF cable
Answer: ABC
58. AAA is a management framework, which protocol is more commonly used to achieve?
A. RADIUS
B. CAPWAP
C. 802.11a/b/g/n
D. 802.1X
Answer: A
59. What does the OU in the directory server represent?
A. User
B. User Groups
C. Organizational unit
D. domain
Answer: C
60. For dBm, dB, dBi, which of the following is correct? (Multiple choice)
A. dBm: Characterizes the absolute value of power
B. dBi and dBd: Relative Values Characterizing Gain
C. dB: Characterizes the relative value of power
D. If antenna A is 12dBi and antenna B is 14dBi, it can be said that A is 2dBi smaller than B
Answer: ABC
61. Which port number of the control message of the CAPWAP tunneling protocol?
A. 1645
B. 1646
C.5246
D. 5247
Answer: C
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62. To create a radio-profile, you must bind wmm-profile, otherwise there will be a configuration error.
A. True
B. False
Answer: A
63. Which of the following statements about star networking in Mesh networking is correct? (Multiple
choice)
A. All connections need to forward data through the central gateway device
B. All connections do not need to pass through the central gateway device for data forwarding
C. All LAN data transmission must pass through MPP
D. All LAN data transmission does not need to pass through MPP
Answer: AC
64. Telnet is one of the ways to remotely manage APs. It can be configured to implement telnet
authentication based on username and password.
A. True
B. False
Answer: A
65. In Huawei eSight network management, the method of adding WLAN devices includes? (Multiple
choice)
A. Manually add
B. Automatically added
C. Batch add
D. Script addition
Answer: ABC
66. Which of the following descriptions of power splitters and couplers is correct?
A. Power dividers and couplers are equal power distribution
B. The power divider is equal power distribution, and the coupler is unequal power distribution
C. The power divider is unequal power distribution, and the coupler is equal power distribution
D. Power dividers and couplers are unequal power distribution
Answer: B
67. In PoE terminology, the full name of PSU is Power Supply Unit, which refers to the power supply
unit, such as the Ethernet interface of the PoE switch.
A. True
B. False
Answer: B
68. When testing the attenuation of obstacles in the WLAN site survey, the signal source needs to be
placed in a suitable position. There is no occlusion between it and the obstacle to be tested. And keep
a certain distance. Because the field strength fluctuates greatly near the signal source, the test will be
inaccurate.
A. True
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B. False
Answer: A
69. Which of the following descriptions about dual-link backup is wrong? (Multiple choice)
A. The establishment process of the main CAPWAP tunnel after the dual-link backup function is
configured is completely consistent with the normal CAPWAP tunnel establishment process.
B. When the AC with dual-link active-standby configuration and the AC without dual-link active-
standby configuration coexist, the AP will give priority to the AC with dual-link active-standby
configuration enabled.
C. Compared with hot backup, dual-link cold backup is to establish a backup CAPWAP tunnel to
realize business after detecting the failure of the primary CAPWAP tunnel.
uninterrupted forwarding
D. Compared with cold backup, dual-link hot backup, CAPWAP tunnel fault detection is performed
between the active and standby ACs, and the status information is synchronized in real time by the
HSB channel
Answer: ACD
70. If you want to create an open authentication security template, which of the following configuration
is correct?
A. AC-WLAN-view] security-profile name security-1 id 1
[AC-WLAN-sec-prof-security-1] open authentication-method open-system
[AC-WLAN-sec-prof-security-1] security-policy open
[AC-WLAN-sec-prof-security-1] quit
B. AC-WLAN-view] security-profile name security-1 id 1
[AC-WLAN-sec-prof-security-1] wep authentication-method open-system
[AC-WLAN-sec-prof-security-1] security-policy wep
[AC-WLAN-sec-prof-security-1] quit
C. AC-WLAN-view] security-profile name security-1 id 1
[AC-WLAN-sec-prof-security-1] wpa authentication-method open-system
[AC-WLAN-sec-prof-security-1] security-policy wpa
[AC-WLAN-sec-prof-security-1] quit
D. AC-WLAN-view] security-profile name security-1 id 1
[AC-WLAN-sec-prof-security-1] wpa2 authentication-method open-system
[AC-WLAN-sec-prof-security-1] security-policy wpa2
[AC-WLAN-sec-prof-security-1] quit
Answer: B
71. In a dual-link backup network, what will the AP use to distinguish between the active AC and the
standby AC? (Multiple choice)
A. Priority
B. The IP address of the AC
C. AC load condition
D. The time when the AC responds to the AP
Answer: ABC
72. What frame does the wireless client actively scan to obtain the surrounding wireless network
information?
A. Beacon frame
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B. Probe Request frame
C. Authentication Request frame
D. Association Request frame
Answer: B
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