Huawei Huawei Certification H12-321 Questions & Answers

• Question 31:

  Which of the following antenna patterns belong to the omnidirectional antenna pattern?

  A. a

  B. b

  C. c

  D. d

  Correct Answer: BD

• Question 32:

  Which of the following statements are TRUE about the application scenarios and features of the ACs? (Multiple Choice)

  A. The AC card such as ACU2 applies to large-scale networks and scenarios which have insufficient rack space but require capacity expansion.

  B. The independent AC such as the AC6605 applies to scenarios which require unified construction of wired and wireless networks and unified management on wired and wireless users.

  C. The native AC such as the X1E card applies to scenarios where the wired and wireless users are managed separately.

  D. The native AC such as the X1E card provides higher forwarding performance than the independent AC, such as the AC6605. In addition, the native AC can implement link and device redundancy, making the WLAN more reliable.

  Correct Answer: AD

• Question 33:

  The following is true about the three backup methods?

  A. Dual-link hot backup: Back up AP and STA information at the same time, and back up CAPWAP link information.

  B. VRRP hot backup: back up AP and STA information at the same time, and back up CAPWAP link information.

  C. Whether a cold backup or a hot backup is a backup AC only supports backup for one primary AC.

  D. Dual-link backup is a cold backup and does not back up STA information. The AP establishes two links with the active and standby ACs at the same time. During the active/standby switchover or the switchback process, the STA needs to go online again, and the service will be temporarily interrupted.

  Correct Answer: D

• Question 34:

  When the air interface frame is a management frame, when the Capability Info field ESS and IBSS bits in the management frame are, can the device be determined to be a wireless bridge?

  A. 00

  B. 01

  C. 10

  D. 11

  Correct Answer: C

• Question 35:

  What is the correct formula for the Earth's curvature below?

  A. a

  B. b

  C. c

  D. d

  Correct Answer: A

• Question 36:

  As shown in the following figure, the data traffic before roaming is forwarded to the STA-HAP-HAC-upper layer network. The forwarding mode is direct forwarding. The home agent is configured on the AC. After the three-layer roaming, the data forwarding traffic is forwarded.

  A. STA-FAP-FAC-upper layer network

  B. STA-FAP-FAC-HAC-FAC-upper layer network

  C. STA-FAP-FAC-HAC-upper layer network

  D. STA-FAP-FAC-HAC-HAP-HAC-upper layer network

  Correct Answer: C

• Question 37:

  Which statements about fast roaming are TRUE? (Multiple Choice)

  A. If the encryption and authentication mode is not WPA2+dotlx, non-fast roaming is implemented.

  B. Re-authentication is not required after fast roaming, and the STA only needs to complete 4-way key negotiation.

  C. Re-authentication is not required after fast roaming, and the STA does not need to complete 4-way key negotiation.

  D. Fast roaming can be implemented for any STA so long as APs support fast roaming.

  Correct Answer: AB

• Question 38:

  Smart roaming ensures that each STA can associate with the AP nearest to it. It implements load balance among APs.

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 39:

  In the N+1 backup networking shown in the figure, 300 APs (API to AP300) go online on AC1 and 400 APs (AP301 to AP700) go online on AC2. AC3 is the standby AC and a maximum of 700 online APs can be configured on AC3. However, AC3 allows a maximum of 500 APs to go online concurrently. Which of the following statements are FALSE when the configuration remains unchanged? (Multiple Choice)

  

  A. If AC1 fails, 300 APs (API to AP300) perform an active/standby switchover and go online on AC3.

  B. If AC2 fails, 400 APs (AP301 to AP700) perform an active/standby switchover and go online on AC3.

  C. If AC1 and AC2 fail concurrently, only 500 APs (API to AP500) perform an active/standby switchover and go online on AC3. The rest 200 APs cannot go online on AC3 and services on these APs are interrupted.

  D. After the faulty AC1 or AC2 recovers, APs that perform a revertive switchover and go online on AC1 or AC2 are uncertain.

  Correct Answer: CD

• Question 40:

  An AP working in monitor mode can forward WLAN data while monitoring neighboring devices.

  A. TRUE

  B. FALSE

  Correct Answer: B