Huawei Huawei Certification H12-321 Questions & Answers

• Question 21:

  Regarding the benefits of package-by-package power adjustment, what is the correct statement?

  A. Turn on the packet-by-packet power adjustment to avoid mutual interference between APs.

  B. Turn on the packet-by-packet power adjustment to save the AP's energy consumption.

  C. Turn on the packet-by-packet power adjustment, which is beneficial to ensure the success rate of packet delivery to the terminal farther from the AP and improve the performance of the air interface.

  D. Turn on the packet-by-packet power adjustment to improve user access security more effectively.

  Correct Answer: A

• Question 22:

  In smart roaming, the AP to which an 802.Ilk-capable STA associates actively instructs the STA to start 802.Ilk-based neighbor measurement, if the AP detects that the STA is a sticky STA. Which of the following items will the STA collect? (Multiple Choice)

  A. BSSID of the AP

  B. Received signal strength indicator (RSSI)

  C. AP model

  D. AP channel

  Correct Answer: ABD

• Question 23:

  Regarding the VRRP hot backup, what is the correct address for the AP to access the AC?

  A. The AP accesses the AC address as the physical address of the primary AC.

  B. The address of the AP accessing the AC is the physical address of the standby AC.

  C. The AP accesses the address of the AC as the primary and standby AC virtual address.

  D. Any address configured in the AC can be

  Correct Answer: C

• Question 24:

  What is the effect after the roaming aggressiveness of the wireless network adapter on a computer is set to a larger value?

  A. The user's network access rate is increased.

  B. The switching between APs is speeded up.

  C. The switching between SSIDs is speeded up.

  D. Wireless network adapter's activeness for automatic network selection is lowered.

  Correct Answer: B

• Question 25:

  Which of the following factors should an engineer consider when determining the mounting height of an antenna in a long-distance point-to-point scenario?

  A. Signal transmission frequency

  B. Distance between transceiver antennas

  C. Antenna beamwidth

  D. Earth curvature

  Correct Answer: ABD

• Question 26:

  Although the Fresnel zone exists in all RF communication scenarios, its impact is mainly considered in which of the following communications?

  A. Outdoor point-to-point scene

  B. Indoor Mesh scene

  C. Indoor cellular coverage

  D. Outdoor cellular coverage

  Correct Answer: A

• Question 27:

  On a WLAN, which of the following attack detection functions require support of the dynamic blacklist function? (Multiple Choice)

  A. Flooding attack detection

  B. Spoofing attack detection

  C. Weak IV attack detection

  D. Brute force attack detection

  Correct Answer: AD

• Question 28:

  As shown in the figure, in order to prevent the STP packets from being transparently transmitted, the loops affect each other. The following does not need to enable the STP spanning tree protocol?

  A. Only the MPP wired side interface needs to enable STP.

  B. Only the MP3 wired side interface needs to enable STP.

  C. MPP and MP3 wired side interfaces must be enabled with STP.

  D. MP1 and MP2 need to enable STP

  Correct Answer: A

• Question 29:

  CAC is implemented in three modes. Which of the following statements about CAC implementation based on channel usage is FALSE?

  A. When receiving a new access request, an AP calculates the current channel usage and checks whether the channel usage reaches the threshold. If not, the AP allows the user to go online.

  B. If the channel usage reaches the threshold after a new user goes online, an AP will reject access requests of new users, send alarms, but cannot hide its SSID.

  C. When a roaming user attempts to access an AP, the AP checks whether the channel usage reaches the CAC roaming threshold. If so, the AP will reject the access request of the roaming user and send alarms.

  D. An AP periodically detects the channel usage of a radio. Once the channel usage falls below the threshold, the AP sends a clear alarm, allowing new users to go online.

  Correct Answer: B

• Question 30:

  Which of the following illegal attack detections require dynamic blacklist support in a WLAN network?

  A. Flood attack detection

  B. Spoof attack detection

  C. Weak IV attack detection

  D. Anti-brute force cracking

  Correct Answer: AD