The HSB group information on the active WAC is as follows. In this case, which of the following statements are true?

• A.Dual-link HSB is enabled on the WAC.
• B.The HSB group is bound to NAC, DHCP, and WLAN services to improve service reliability.
• C.VRRP HSB is enabled on the WAC.
• D.The group status is Active. Therefore, the HSB status of the WAC is stable.

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802. 11r fast roaming (over-the-air) is enabled on the WLAN shown in the figure. A STA roams from AP1 to AP2. Sort the steps in chronological order during the 802.11r fast roaming process between WACs.

Correct Answer:

Explanation:
According to the Huawei documents and resources, the chronological order during the 802.11r fast roaming process between WACs is as follows:
2.The STA accesses the network through API. This is the initial association process before roaming.
1.The STA initiates an 802.11 FT authentication request to AP2. This is the first step of the roaming process when the STA moves to a new AP.
3.AP2 starts the reassociation timer, and sends an 802.11 FT authentication response to the STA. This is the second step of the roaming process when AP2 responds to the STA's request and sets a timer for reassociation.
4.The STA generates and installs a P TK based on the information contained in the response frame. This is the third step of the roaming process when the STA derives a new pairwise key for encryption.
5.The STA sends a reassociation request to AP2. This is the fourth step of the roaming process when the STA requests to reassociate with AP2.
6.AP2 generates and installs a PTK according to PMK-RI and information contained in the request frame.
This is the fifth step of the roaming process when AP2 derives the same pairwise key as the STA.
7.After receiving the reassociation request, AP2 disables the reassociation timer, and then sends a reassociation reg onse to the STA. This is the sixth step of the roaming process when AP2 confirms the reassociation with the STA and stops the timer.
8.The STA receives the response frame of AP2. The roaming process is complete. This is the final step of the roaming process when the STA completes the handover to AP2.
Therefore, 2, 1, 3, 4, 5, 6, 7, 8 is the correct answer. References: https://support.huawei.com/enterprise/en/doc
/EDOC1100169459/8d79210e/configuring-wireless-mesh-networking

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Sticky STAs stick to the initially associated APs. Even if the STAs are far away from the currently associated AP, have weak signals, or have low rates, they will not roam to neighboring APs with better signals.

• A.FALSE
• B.TRUE

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Master NCE-Campuslnsight can comprehensively record and analyze Interference. Which of the following parameters are recorded? (Select All that Apply)

• A.Recommended channels
• B.Interference fulfillment rate
• C.Interference strength
• D.Number of interference SSIDs
• E.Air interface congestion fulfillment rate

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AD authentication integrates Kerberos authentication into LDAP authentication. The basic AD architecture consists of the user, AD client, and AD server. Which of the following are components of an A3 server?

• A.LDAP server
• B.Authorization server
• C.Key distribution center
• D.Accounting server

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