Huawei H12-351_V1.0 Practice Test - Questions Answers, Page 2

MP: Mesh node that uses IEEE 802.11 MAC and PHY protocols for wireless communication. This node supports automatic topology discovery, automatic route discovery, and data packet forwarding. It can provide both mesh service and user access service1.

MPP: MP node that connects a WMN to MPs on other types of networks. This node can function as a portal for communication between internal mesh nodes and external networks1.

Neighbor MP: Neighboring MP with which an MP prepares to establish a mesh link1.

Candidate MP: AP that directly communicates with a mesh node2.

https://support.huawei.com/enterprise/en/doc/EDOC1100064365/90f2391e/configurationexamples-for-mesh 2:

https://support.huawei.com/enterprise/en/doc/EDOC1100169459/8d79210e/configuring-wirelessmesh-networking

According to the Huawei documents and resources, the VRRP preemption delay is the time that an

AC waits before preempting another AC with a lower priority. If the VRRP preemption delay is set to a small value, the following problems may occur after a master/backup switchover:

B. A master/backup switchback is triggered too quickly. If the master AC recovers soon after a switchover, it may preempt the backup AC again and become the master AC. This may cause frequent switchovers and affect network stability1.

C. Backup information is incomplete. If the backup AC takes over services from the master AC too quickly, it may not have received all the data synchronized from the master AC through HSB. This may cause service interruption or data loss2.

Therefore, B and C are the correct answers. Reference: 1:

https://support.huawei.com/enterprise/en/doc/EDOC1100064368/80fc2ebd/example-forconfiguring-vrrp-hsb 2:

https://support.huawei.com/enterprise/en/doc/EDOC1100096325/1a753937/vrrp-hsb-configuration

The display sync-configuration compare command is used to check whether the public configurations on two WACs are consistent after wireless configuration synchronization. The command output shows the differences between the configurations on the master and backup WACs. In this case, the configuration of vap-profile name 3 exists on the master WAC but not on the backup WAC.

Reference: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/displaysync-configuration-compare

In a dual-link backup scenario, when the active link recovers, the AP waits for 15 Echo intervals before switching back to the original primary WAC. This prevents frequent link switchovers caused by unstable links.

Reference: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/dual-linkbackup

In a dual-link HSB scenario, after an AP sets up CAPWAP links with the active and standby WACs, the

AP periodically sends Echo packets to the WACs to detect link status. The Echo packets are sent every 30 seconds by default.

Reference: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/dual-linkhsb

Smart roaming is not a roaming optimization solution, but a feature that allows an AP to automatically adjust its transmit power based on signal strength and interference level. The other options are all roaming optimization solutions that can reduce roaming latency and packet loss.

Reference: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/smartroaming

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. Reference:

https://support.huawei.com/enterprise/en/doc/EDOC1100169459/8d79210e/configuring-wirelessmesh-networking

The WPA3 transition mode applies to both WPA3-Enterprise and WPA3-Personal. In this mode, WPA3 and WPA2 can coexist for a period of time in the future to enable WPA3-incapable STAs to access a WPA3-configured network.

Reference: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/wpa3-transition-mode

URL filtering supports four matching modes: exact matching, suffix matching, prefix matching, and keyword matching. The priority order of these modes is as follows:

Exact matching: The highest priority. An exact match means that a URL entered by a user is exactly the same as a URL in a blacklist or whitelist.

Suffix matching: The second highest priority. A suffix match means that a URL entered by a user ends with a suffix in a blacklist or whitelist.

Prefix matching: The third highest priority. A prefix match means that a URL entered by a user starts with a prefix in a blacklist or whitelist.

Keyword matching: The lowest priority. A keyword match means that a URL entered by a user contains a keyword in a blacklist or whitelist.

Reference: https://support.huawei.com/enterprise/en/doc/EDOC1100058940/8a8f1c9b/url-filtering