H12-321 Online Practice Questions and Answers

What information can the Agile Controller send to the NAS device for permission control?

A. VLAN

B. ACL

C. Static ARP binding relationship

D. Static routing

E. Certain specific RADIUSM properties

During dual-link hot backup, the AP establishes a CAPWAP link with both the primary AC and the backup AC.

A. Correct

B. False

Which of the following statements are TRUE about band steering supported by Huawei devices? (Multiple Choice)

A. Load balancing between the 2.4 GHz and 5 GHz radios is considered in band steering. An AP determines the radio with which a STA preferentially associates based on numbers of access users on the 2.4 GHz and 5 GHz radios.

B. Check whether the number of access users on an AP exceeds the start threshold for load balancing between radios. If not, STAs can preferentially associate with the 5 GHz radio.

C. If the number of access users on an AP exceeds the start threshold for load balancing between radios, the AP determines the frequency band to which the STA connects based on radio load difference computed according to the formula (Number of access users on the 5 GHz radio -Number of access users on the 2.4 GHz radio/Number of access users on the 5 GHz radio x 100%).

D. After the number of users associated with an AP reaches the start threshold for load balancing between radios, if the value obtained based on the formula (Number of access users on the 5 GHz radio - Number of access users on the 2.4 GHz radio/Number of access users on the 5 GHz radio x 100%) is greater than the gap-threshold value, the AP preferentially associates with the STA on the 5 GHz radio.

In a WLAN project, the AC upgrade is interrupted due to a power outage, causing damage to the AC system. In this situation, which of the following method can be used to re-upgrade the AC?

A. CLI-based upgrade

B. Web-based upgrade

C. Boot upgrade

D. Upgrade using the eSight

The Layer 3 roaming refers to the change of the service VLAN of the VAP when the user roams from the original AP to the new AP. After the roaming, the data packets of the user are switched to the VLAN of the new AP.

A. Correct

B. False

Which of the following techniques are part of the way to implement STA fast roaming?

A. PMK caching

B. Key negotiation down

C. Improve terminal roaming initiative

D. Home agent is deployed on the AC

A company needs to build a large Layer 3 WLAN to cover its office building. There are a large number of employees in the office building and they usually connect to the company WLAN at the entrance and then move to their own work locations.

The company has deployed a wired network and developed a mature wired network management mechanism. The company requires that the newly deployed WLAN be managed and maintained uniformly with the wired network. The IP address of the AC is 172.168.11.1.

Which of the following operations performed by network engineers are CORRECT during WLAN planning? (Multiple Choice)

A. To facilitate unified wired and wireless network management, adopt the "Chassis switch+ACU2" architecture and configure wired and wireless convergence.

B. Because the company has a large number of employees and they all connect to the WLAN at the office building entrance, configure VLAN Pool to address the challenge of too many IP address requests in certain areas.

C. On a large WLAN, an AC manages many APs. To facilitate unified management and maintenance, add APs connected to the AC to the same AP group.

D. On a Layer 3 WLAN, set the Option 43 field to 030B3137322E3136382E31312E31 on the Windows 2003 DHCP server.

To improve reliability of the CAPWAP link between the AP and AC on a large WLAN, users can set a higher DSCP priority for CAPWAP management packets.

A. TRUE

B. FALSE

Which statements about Layer 2 and Layer 3 roaming are TRUE? (Multiple Choice)

A. After Layer 3 roaming is performed, the VLAN IDs in the service set of APs are changed.

B. If the VLAN IDs before and after roaming are the same, the STA roams at Layer 2.

C. Layer 2 roaming indicates that STAs roam within the same subnet.

D. Layer 3 roaming indicates that STAs roam between different subnets.

Both the N+1 backup and the dual-link cold backup support the link switchback function. To avoid frequent network switchovers, N+1 backup and dual-link cold backup are waiting for 20 heartbeat cycles by default. Switch back operation.

A. Correct

B. False