A. The AP line is not connected to the terminal, and the air interface utilization rate is 0

A. Probe Response

B. Beacon

C. Authentication Request

D. Probe Request

A. FIT AP status shows imageload during the registration process, indicating that FIT AP is downloading software from AC

B. After the FIT AP is successfully registered on the AC, the status displayed is Run, if the registration is unsuccessful, the status is displayed as Idle

C. During the FIT AP registration process, you must ensure that the AP number added on the AC is consistent with the actual device

D. There should be a FIT AP software that matches its version in the AC's flash, and make sure that the name is correct

A. Enter "ssid ***" directly in the service-template view to modify

B. You cannot modify the name of the SSID in the wlan service-template, you can only delete the original service-template, then create a new service-template and enter the new SSID name to achieve the purpose of modifying the SSID name

C. First enter "radio disable" in the radio view of the AP, and then enter "ssid***" in the service-template view to modify.

D. In the service-template view, first enter "service-template disable", then enter "ssid ***", and finally enter "service-template enable" to complete the modification of an SSID name

A. False

B. True

A. 1 or 0

A. The MAC layer of 802.11 is responsible for the communication between the client and the AP. The main functions include scanning, authentication and association.

B. The management frame is responsible for the ability level interaction, authentication, association and other management tasks between STA and AP. For example, the Beacon frame is a kind of management frame

C. Control frames are control messages that assist in sending data frames, such as RTS, CTS, ACK, etc.

D. 802.11 MAC messages are divided into data frames, control frames and management frames.

A. Configure the same wireless access service SSID

B. Configure the same working channel

C. Configure the same mesh-id

D. Configure the same encryption key

A. Length of network cable and feeder

B. Installation method

C. The distance between two points, the number of equipment models

D. Required engineering accessories (posts and kits, grounding wires, power cables, casings, etc.)

A. Association ID association ID, each STA that successfully associates with AP will be assigned an association ID number;

B. The default interval of Beacon interval is 100, and the unit is milliseconds

C. TIM data pending indication is a series of bitmaps, each bit represents an associated user, 0 and 1 represent whether there is cached data

D. Listen interval is the interval at which dormant clients must periodically wake up and listen to Beacon

A. Wrap it with insulating tape first, then wrap it with a layer of insulating tape, and finally add a layer of waterproof tape to seal it.

B. Wrap it with insulating tape first, then wrap it with a layer of waterproof tape, and finally add a layer of insulating tape to seal it.

C. Wrap it with waterproof tape first, then wrap it with a layer of insulating tape, and finally seal it with a layer of waterproof tape.

D. Wrap it with waterproof tape first, then wrap it with a layer of insulating tape, and finally add a layer of insulating tape to seal it.

A. Perform license related operations to ensure that the AC's license specifications can meet the requirements

B. Record the correspondence between the AP and the selected switch and its port

C. On-site AP registration operation to ensure that all arriving APs can successfully register on the AC

D. Record the AP installation point, serial number, and MAC address correspondence

A. When deploying indoor multiple APs, in order to meet the wireless application requirements of a certain user density, the appropriate AP installation location, installation method, transmission power, etc. Reduce the number of visible signals in the three-dimensional space as much as possible.

B. When conducting wireless network surveys, it is necessary to ensure that the coverage area is the same as the actual application area. When the signal coverage is affected by obstacles and the wireless signal coverage cannot meet the actual application requirements, the deployment plan needs to be adjusted in time.

C. When deploying indoor multiple APs, in order to ensure a good signal strength index, the AP should work at the maximum transmit power, and attention should be paid to the channel division between APs.

D. When planning signal coverage in a three-dimensional space, the problem of signal leakage across floors is unavoidable. Therefore, the degradation of wireless link quality caused by signal leakage needs to be considered and optimized.