EMT Practice Test

1. Question Content...

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Question1: The FAT AP can use the black and white list function to implement user access control. If a client MAC address is on both the black list and the white list, then:

Question2: Among the following descriptions about H3C FIT AP registration, which statement is correct?

Question3: What are the commonly used troubleshooting commands for WLAN network failures?

Question4: Run the command " display wlan client mac--address XXXX--XXXX-XXXX " to view the detailed running status of the wireless client.
Which numbers reflect the received signal strength and quality at the client?

Question5: (Multiple choice) Which of the explanations for common WLAN terms is correct?

Question6: The WX3024 is divided into two control modules, which are the wireless control module and the switching module. The wireless control module and the switching module are connected through internal interfaces. The internal interface of the wireless control module is _____, and the internal interface of the switching module is _______

Question7: For high-density wireless user access areas, it is necessary to consider deploying multiple APs in the same area.

Question8: When increasing the gain of an omnidirectional antenna, which of the following statements is true about the coverage of the antenna?

Question9: The above wireless protocols that can work in the 2.4GHz band are

Question10: Several wireless technologies currently used in the industry include:

Question11: The protocols used for management and control between the wireless controller and the FIT AP are:

Question12: Common problem-diagnosing commands for wireless troubleshooting are:

Question13: The so-called modulation is to change the relevant properties of the carrier according to the information to be sent, so that the information is encoded on the carrier. The properties of the basic carrier that can be modulated are:

Question14: When the H3C outdoor AP is installed in an outdoor environment and goes online through an Ethernet cable, a network port surge protector is required for lightning protection of the near-end switch. The following is the port diagram of the POE-MH network port surge protector.

Judging from the picture, which port is used to connect the near-end switch?

Question15: The best way to determine the distance between wireless devices is to ______

Question16: Which of the following methods can reduce signal interference?

Question17: Regarding the matters needing attention in the process of wireless network survey and design, the following statement is correct

Question18: When the wireless bridge (WDS) fails, the first thing to do is to check the engineering installation specifications. The correct description below is

Question19: The construction party reported that the AP could not be successfully registered to the AC after the normal power-on. The possible reasons are ______

Question20: When switching H3CAP from FAT to FIT mode, it can be realized by command ______.

Question21: When planning a WLAN network, the first consideration should be the effective interaction of wireless signals between APs and wireless terminals, followed by the effective broadband access to users.

Question22: H3CFitAP supports the following three working modes, which of them can discover third-party devices?

Question23: The correct wireless network optimization implementation steps are:

Question24: When H3CAP establishes a wireless bridging application, you can use the command " [h3c-hide cmd] display wlan mesh neighbors all "to view all the neighbor information of the current device. The following is the peer neighbor device information viewed on the local device.

Based on the above output, which of the following statements are correct?

Question25: Attention should be paid to the use of debugging commands

Question26: When using a WLAN dual-band combiner for indoor distributed system combining and expansion, the following statements are correct:

Question27: When locating the problem of unsuccessful Fit AP registration, you can debug the relevant LWAPP information on the AC or Fit AP for analysis. The recommended debug commands are:

Question28: In the configuration of the wireless controller function implementation, if you need to modify the service template or the related configuration of the virtual wireless interface that is already in use, the first step of configuration is:

Question29: Which of the radio link handover control parameters is correct?

Question30: It is true that the sequence of PSK certification, 802.1X certification and antenna 802.11 step-by-step competition is correct.

Question31: The smooth switching of FAT/FIT AP working mode mainly comes from ()

Question32: Which of the following is wrong in the description of the wireless roaming navigation function

Question33: Which of the following commands can view the detailed information in the H3C wireless controller, such as the IP address obtained by the AP?

Question34: When the encryption level is 128-bit Shared Network Authentication (WEP) for the wireless channel, the number of HEX characters required to be entered is ______.

Question35: Which of the following is wrong in the description of the wireless spectrum navigation function

Question36: (Single Choice) The following technologies are not specific to the 802.11ax protocol.

Question37: Which of the following statements about AP AC power supply is correct?

Question38: Which is correct about air interface utilization

Question39: In the long-distance transmission of wireless signals, the Fresnel Zone (Fresnel Zone) is an important concept.
Which of the following statements about the Fresnel zone is true

Question40: In the wireless controller mode of WX3000 series or WX6103, it can be switched to switch board mode by command.

Question41: The physical layer transmission bandwidth of the current mainstream WiFi protocol 802.11g is 54Mbps, but the available bandwidth above the actual transmission layer is about

Question42: Use waterproof tape to waterproof the joint parts of the antenna to _______

Question43: When the WLAN is combined with the operator's indoor distributed system, the FAT AP must be used instead of the FIT AP. The above statement is

Question44: The media access mechanism of an 802.11 network is ______. In this mechanism, when the sender detects that the media is idle _______.

Question45: In the 802.11a/g protocol, the OFDM transmission technology defines

Question46: The correct description for the hierarchical AC function is ____.

Question47: The following are not 802.11ax improvements to 802.11ac technology:

Question48: it ap cannot be registered to the controller, which of the following commands can be used to view (multiple choice)

Question49: In the wireless controller and thin AP networking configuration, what command can be used to view the detailed information of the client connected to the specified AP?

Question50: Generally speaking, if the modulation method used is more complicated, the transmission rate obtained is ______, and the coverage of the wireless signal is ______.

Question51: The interface type of the external antenna is generally N type.

Question52: The significance of network survey includes:

Question53: In the 802.11b/g protocol, there are a total of 13 channels (1--13) open in China. Please select 3 channels that do not interfere with each other from these 13 channels. Which of the following groups is correct?

Question54: The following wireless controllers belonging to the operator's exclusive funds are:

Question55: The following models of wireless service boards that do not need to configure switch port aggregation are ( )

Question56: When WA2220X-AGP works as a bridge under 11a, by default, it can

Question57: Currently, can the H3C wireless controller be used with FITAP from other manufacturers?

Question58: In the implicit mode of H3CAP device, you can use the command "display ar5drv[1l 2] statistics" to check whether the AP sends Beacon frames. If you check this command continuously and find that the value of ________ increases, it means that the AP is sending Beacon frames normally .

Question59: Note when using AP for wireless bridging

Question60: What are the working frequency bands of WLAN?

Question61: Unlike 802.11a/b/g which only uses 20MHZ bandwidth, 802.11n defines two bandwidths, 20M and 40M, and the number of channels that can provide non-interfering channels in 40M bandwidth mode in the 2.4GHZ frequency band is ( )

Question62: Which of the following belong to H3C's optimization technology innovation based on WLAN service application?

Question63: What frequency band does the WLAN network use?

Question64: If the AP transmit power is 500mw, then the corresponding dbm value is

Question65: What are the advantages of wireless network over wired network ( )

Question66: The connector of H3C company's wireless equipment generally adopts reverse polarity SMA (RP-SMA), its characteristic is.

Question67: In the planning of the wireless network, it is generally recommended to increase the equipment allowance of ______ on the basis of the number of APs based on the site survey and statistics.

Question68: The following APs that belong to the Terminator split pass-through mode are:

Question69: The wireless protocols that can work in the 2.4Ghz band are

Question70: The concepts of receiving sensitivity and maximum transmit power are consistent, and both express the same meaning.

Question71: The authentication methods supported by Oasis Cloud Management Platform include ____.

Question72: Regarding the wireless client roaming among multiple H3C wireless controllers, which of the following statements is true ______

Question73: Which description is correct about WIPS for wireless intrusion detection?

Question74: Air interface channel utilization* is an important indicator for judging the current channel busyness of the AP. By checking the air interface channel utilization rate of the AP, the current occupancy of this channel can be judged.
The following description about how to check the air interface channel utilization" is correct ()

Question75: Regarding wireless network roaming: Which of the following statements is true:

Question76: The correct statement about the wireless architecture of rail transit is:

Question77: The following statement about H3C wireless switch + FIT AP system is wrong

Question78: For coverage planning with small radius and multiple areas of concurrent users, the correct statement is _____.

Question79: Which of the following descriptions about the PoE power supply requirements of AP products is correct?

Question80: Methods to Avoid Signal Interference in Comprehensive Office Areas

Question81: The highest rate that can be negotiated with an 802.11n wireless network card using a 20MHz channel bandwidth for an 802.11n-enabled AP is _______

Question82: In order to increase the ease of use, the FIT AP version of wireless products will no longer be released separately, but will be included in the package file of the corresponding wireless controller version.

Question83: What are the links in the wireless network optimization service delivery process for personnel input?

Question84: When deployed outdoors, a lightning protection device needs to be installed. The following lightning protection devices are:

Question85: first. The multi-frequency combiner should be able to support the required working frequency band, and the closer its passband frequency is to the working frequency of the wireless system, the better, without redundant passband, so as to ensure the best effect; For combiners, the isolation between ports is generally greater than 80dB, which can minimize the interference between different systems.
The above statement is correct.

Question86: The configuration is as follows. Assuming that 13 wireless clients have been connected to the SSID "H3C" of ap1 radio1 at this time, according to the above configuration, the SSID "VIP" of ap1 radio1 can still connect to ______ at most.

Question87: Enable the wireless user speed limit function on the SSID "H3C" of the Fat AP, the configuration is as shown in the figure.

Based on the above configuration, which of the following statements are correct?

Question88: In wireless authentication, if the 802.1x authentication method is used, the EAP method that is not included is. (Advanced Talent Test)

Question89: Which of the following commands can be used to locate the problem that the Fit AP cannot be successfully registered?

Question90: Which of the following technologies are the key technologies and improvements introduced by 802.11ac

Question91: There may be some differences between the AP deployment location during the survey and the actual deployment location of the AP during the project implementation. In order to ensure the accuracy of the survey data, the deployment position of the AP should be as consistent as possible with the actual installation position during the survey. The above statement is _____.

Question92: The following devices that generate 2.4GHz electromagnetic waves are

Question93: The IRF incense stacking networking methods supported by the wireless controller include ____.

Question94: About the CAPWAP protocol AP registration to AC interaction process description is correct ()

Question95: In order to reduce the influence of the surrounding environment and ensure the stability of the wireless bridging device, the _____ frequency band is usually used to establish a bridging application; at the same time, the working channels of the two bridging devices are

Question96: The shape characteristics of the H3C indoor AP RF connector are:

Question97: Generally, it has a strong attenuation effect on the wireless signal, and the site survey is the obstacle that needs special attention.

Question98: For wireless dense user areas, which of the following is the best way to increase bandwidth and performance per user?

Question99: The statement about ACK confirmation and retransmission mechanism is correct.

Question100: The wireless network authentication method for user authorization authentication by linking with the radius server is. (only for advanced exam)

Question101: According to the working principle of the wireless air interface competition mechanism (CSMA/CA), it is recommended that the number of nodes participating in the competition should not exceed _____, because when the contention points reach ______, the air interface conflict will increase sharply. To ensure the effective bandwidth of users, it is recommended that the number of concurrent users under each AP does not exceed ______.

Question102: Which of the following is incorrect about WLAN engineering optimization

Question103: Which of the following descriptions about 802.11g WLAN devices is correct

Question104: Which of the following descriptions about wireless bridging is correct?

Question105: The 802.11 protocol essentially provides a link layer access service for wireless clients. If you need to query the IP address of the wireless client, which of the following commands can be used?

Question106: In the wireless network survey and design, when covering floors and areas with business requirements, the received signal strength of more than 95% of the target coverage area should be greater than or equal to _____ (experience value, applicable to most wireless network cards) Key coverage Regional signal strength should be greater than or equal to ____

Question107: If the AP transmit power is 100mw, then the corresponding dbm value is _____

Question108: The H3C wireless controller can use the command "display wlan ap all verbose" to view the detailed information of AP registration. The following output is the detailed information of an AP viewed through this command.


From the above information, it can be known that _

Question109: What are the ways to deploy wireless positioning APs?