Huawei H12-311_V3.0-ENU Exam Dumps Updated (V9.02) – Completely Pass HCIA-WLAN V3.0 Exam with Ease

1. In the 802.11 frame, what type of frame does the STA 's association request and authentication request belong to?

2. Which of the following aspects are the technical advantages of 802.11n compared to 802.11a/b/g?

3. Which of the following standards organizations implements WLAN technology interoperability for WLAN equipment certification?

4. The CAPWAP protocol is a WLAN standard proposed by the IEEE standard organization in April 2009, and is used for communication between the AC and the thin AP.

5. How many channels does China support in the 2.4GHz frequency band?

6. Which of the following options belongs to the 5GHz frequency band supported?

7. Which modulation method does the picture below belong to?

8. What is the name of the first radio communication network based on packet technology?

9. How many channels can the 2.4 GHz frequency band be divided into?

10. What is the 2.4 GHz band U.S. non-overlapping channel?

11. What is the distance between the center frequencies of each channel in the 2.4 GHz band?

12. What is the bandwidth of each channel in the 802.11g frequency band?

13. Which of the following protocols can support both the 2.4GHz frequency band and the 5GHz frequency band?

14. What is the range of working frequency stipulated in 2.4 GHz band?

15. The basic service set is the basic component of the 802.11 network, which is composed of a group of workstations communicating with each other.

16. BSSID is actually the MAC address of the AP, which is used to identify the BSS managed by the AP.

17. Which of the following is a wireless local area network standard originally formulated by IEEE?

18. Huawei AP products can only support one SSID configuration.

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

20. What is the name of SSID?

21. An infrastructure mode network consisting of multiple APs and the distributed systems connecting them, also known as which one?

22. Which of the following AP modes does not belong to the WDS network?

23. What is a network composed of a wireless AP and associated wireless clients called?

24. If a BSS is completely composed of STAs, what is the name of the BSS?

25. Mesh networking is defined in which of the following protocols?

26. What is the area covered by a single AP called?

27. The full name of BSS is Basic Service Set. BSS can be divided into Independent BSS and Infrastructure BSS.

28. Which of the following technologies belongs to wireless metropolitan area network?

29. If the wireless client wants to connect to the WLAN through the AP, what does it use to connect to the wireless network?

30. In WLAN, the AP has been working in the half-duplex state.

31. In 1999, the IEEE 802.11a standard was formulated, which stipulated that the working frequency band of wireless local area network was 5.15-5.825GHz, and the data transmission rate reached 11Mbps.

32. Unlike the 802.11a/b/g standard, the 802.11n protocol is a dual-frequency working mode (supporting two working frequency bands of 2.4GHz and 5GHz).

33. 802.11b supports () channels in the United States, of which () channels do not overlap.

34. What is the maximum rate supported by the original 802.11 protocol in Mbps?

35. What is the working frequency band used by the original 802.11 protocol?

36. Which of the following options is the maximum rate supported by the 802.11g protocol?

37. Which technology is used to implement the 802.11a protocol?

38. What type of frame () does the ACK frame belong to in WLAN?

39. What is the parameter used to check the integrity of the received frame in the 802.11 frame?

40. What parameters are used in 802.11 frames to reassemble frame segments?

41. What frame does the passive scanning of the wireless client obtain the surrounding wireless network information?

42. What frame does the wireless client actively scan to obtain the surrounding wireless network information?

43. There are four wireless STAs. According to the following back-off time parameters, which workstation is the priority to occupy the channel?

44. What is the mandatory wireless LAN security standard?

45. CAPWAP protocol was proposed by which of the following standard organizations?

46. ETSI is the standard organization of which country or region?

47. The point-to-point wireless bridge can be used to connect two networks located in different places. In the wireless backbone connection, Root AP and Leaf AP should be set to different channels.

48. In a WDS network, a Root AP can connect to multiple Leaf APs, but a Leaf AP can only connect to one Root AP.

49. In the WDS network, what is the name of the AP that is connected to the AC by wire?

50. The 802.11 physical layer standard defines some common operations of the wireless network at the physical layer: such as QoS, security, roaming and other operations.

51. Barker code is an 11-bit sequence (for example, 10110111000), which has advantages in wireless transmission and can effectively reduce interference, but reduces efficiency.

52. 802.11b is a protocol based on Orthogonal Frequency Division Multiplexing (OFDM for short) technology.

53. The 802.11n standard uses dual frequency bands (2.4GHz and 5GHz), the theoretical transmission rate can reach up to 300Mbps, and the actual test rate can reach more than 100Mbps.

54. The modulation methods adopted by DSSS are BPSK and QPSK respectively.

55. Spread-spectrum (spread-spectrum) technology is the basis for transmitting wireless data using the ISM frequency band.

56. In a point-to-multipoint networking environment, one device acts 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 pass through the central bridge device for data forwarding.

57. Because the maximum rate supported by 802.11a is the same as that supported by 802.11g, the 802.11a protocol is backward compatible with the 802.11g protocol.

58. Which of the following rates is not supported by the 802.11a protocol?

59. A company wants to deploy WLAN. The company purchased a batch of wireless APs that support 802.11n. After the WLAN is deployed, only wireless clients that support 802.11n can connect to the company's WLAN.

60. In the 802.11 frame, the value used to record the network allocation vector (NAV) is?

61. In the 802.11 frame, which address bit of the Address bit represents the address of the frame receiving end?

62. In the 802.11 frame, what is the correct correspondence between Type and frame format in the Frame Control bit?

63. In the 802.11 frame, when the wireless workstation sends a signal to the wireless AP, what are the values of To DS and From DS?

64. In the 802.11 frame, when the network uses the WDS model for signal transmission, what are the values of To DS and From DS?

65. In 802.11, which has the longest interval between frames?

66. If the AP is working in the infrastructure mode, then the working state of the AP at this time is full-duplex mode.

67. If a wireless client is connected to two APs with the same SSID, what is used to determine which wireless AP the wireless terminal is connected to?

68. If a wireless client connected to the same SSID wants to roam from one AP to another, what is the range of signal overlap between the two APs?

69. In the 802.11 frame, what kind of control message should the terminal send to obtain access to the wireless medium?

70. In the 802.11 frame, which message is used for the terminal to receive data packets in power saving mode?

71. In the 802.11 frame, what is the interframe interval between RTS and CTS?

72. When a data frame is sent and confirmed, what is the time interval before the next data frame is sent?

73. In the WDS point-to-point network, the backbone link between the Root AP and the Leaf AP is connected using the 5GHz frequency band. The frequency band used by the Root AP is 149, so which of the following frequency bands should the Leaf AP use?

74. MIMO (Multiple input and multiple output), that is, multiple input and multiple output, wireless access points and clients using 802.11n technology can use up to three spatial streams to transmit data at the same time, and the theoretical rate can reach up to 600Mbps.

75. What are the rates supported by 802.11a?

76. What are the rates supported by 802.11g?

77. How many subcarriers can be used to transmit data in 802.11n 20M mode?

78. How many subcarriers can be used to transmit data in 802.11a in 20M mode?

79. If an 802.11n AP supports 2*2 MIMO technology, what is the theoretical rate of this AP?

80. Huawei's box-type wireless controller AC6605 supports 24 PoE interfaces, and can directly supply power to APs connected to ACs in WLAN networking.

81. In the process of the thin AP discovering the AC, the first step is that the AP checks whether there is a pre-configured static AC IP list.

82. 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.

83. In WLAN networking configuration, what command must be executed on AC6605 to deliver the configuration to AP1?

84. Which of the following commands can configure the port of the Huawei switch to hybrid mode?

85. To create a user for Huawei's AC, first use the aaa command to enter the view.

86. The upgrade operation of Huawei wireless controller AC6605 can only be performed on the wired side of the controller.

87. The MEth0/0/1 interface of AC6605 is used for in-band network management, the default address is: 192.168.1.1/24, and it cannot be modified.

88. To upgrade the AP through FTP, you need to ensure that the AP and the FTP server can communicate with each other, and put the AP upgrade file in the FTP root directory.

89. Huawei AP6310AP is an outdoor AP that can support WDS function and realize point-to-multipoint wireless bridging function.

90. Telnet is one of the ways to remotely manage APs. It can be configured to implement telnet authentication based on username and password.

91. What is the command for Huawei AC6605 to switch between the wired side and the wireless side?

92. What is the command to check online users on AC?

93. Which of the following is the command to restart AC6605?

94. Regarding the telnet management of AC6605, which of the following statement is wrong?

95. Huawei wireless controller AC6605 supports user access security management through security templates, and supports four security policies: WEP, WPA/WPA2, and WAPI.

96. If you change the configuration parameters of the AP radio frequency, you must restart the AP before the command can take effect.

97. What is the recommended AC-ID () for Huawei wireless controllers when configuring enterprise network WLAN services?

98. Which of the following statement about SSID is wrong?

99. What is the VLAN which used to establish a CAPWAP tunnel VLAN for AP and AC?

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