Passed HCIP-WLAN H12-321-ENU Exam with 800 Score

1. Which of the following statements about Option 43 in the N+1 backup networking are TRUE? (Multiple Choice)

After Option 43 is configured, the AP only unicasts Discovery Request messages to the AC’s IP addresses carried in Option 43.

If the AC with the IP address carried in Option 43 does not respond, the AP fails to discover the AC.

When configuring Option 43, you need to specify IP addresses of the active and standby ACs for the AP, and IP addresses of the other active ACs.

The command for setting Option 43 on the DHCP server to IP addresses of the active and standby ACs is option 43 sub-option 2 ip-address ip-address &<1-8>.

2. On WLANs where many users exist, such as WLANs in high density scenarios, users compete fiercely to occupy channels as the number of online users increases. As a result, network quality deteriorates. To ensure network access experience of online users, Calling Access Control (CAC) can be configured. CAC allows an AP to control user access based on the CAC thresholds set according to the radio channel usage, number of online users on a radio, or terminal signal-to-noise ratio (SNR), ensuring network access quality of online users.

TRUE

FALSE

3. Which of the following STAs does MAC address authentication suit the most?

Office PC running a Windows OS

Testing PC running a Linux system

Mobile terminal, such as a smartphone

Network printer

4. On a WLAN with the WIDS function enabled, which of the following devices will NOT trigger rogue device alarms after they are identified as rogue devices? (Multiple Choice)

Ad-hoc

Wireless bridge

STA

5. Engineers of a large enterprise configure the VLAN Pool function when deploying the WLAN.
Which of the following options may be the reasons for configuring the function? (Multiple Choice)

There are a large number of IP address requests in some areas.

Users request to obtain fixed IP addresses.

To reduce the broadcast domain to limit the number of broadcast packets, thereby to improve the network performance.

Break the limit that one SSID can only correspond to one VLAN.

6. On a WLAN that uses the Agile Controller as the admission control server, which of the following is NOT the cause of 802.1x authentication failures?

The key used by the Agile Controller to connect to the device is different from the key configured on the device.

The accounting interval is not configured.

Port 1813 is used on the server.

The matched authorization rule defines the action “deny”.

7. Which of the following statements about the second Fresnel zone are TRUE? (Multiple Choice)

If the RF signal and primary signal have the same frequency and different phases and the two signals intersect, the RF signal weakens or even offsets the primary signal. Because reflection is one of the factors causing interference to the primary signal, impact of the second Fresnel zone on signals must be considered during evaluation of point-to-point communication links.

If signals in the second Fresnel zone are reflected to the receive end due to the antenna height and terrain, the link quality may degrade.

Impact of the second Fresnel zone should be considered during network planning and troubleshooting, especially in flat and dry environments (such as deserts).

The second Fresnel zone is surrounded by the first Fresnel zone.

8. Which of the following statements about APs and STAs are TRUE during an active/standby switchover in dual-link HSB mode? (Multiple Choice)

APs do not need to go online again.

APs need to go online again.

STAs do not need to go online again.

STAs need to go online again.

9. Which of the following statements about the dual-link cold backup networking are TRUE? (Multiple Choice)

An AP sets up a CAPWAP tunnel only with the active AC.

An AP sets up CAPWAP tunnels with both the active and standby ACs.

An AP periodically exchanges CAPWAP packets with both the active and standby ACs to detect link status.

An AP periodically exchanges CAPWAP packets only with the active AC to detect link status.

10. Which are the methods to prevent loops on a Mesh network? (Multiple Choice)

STP

TTL

Repeated frame sequence number check

MSTP

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