H12-311-V3.0 HCIA-WLAN V3.0 Practice Questions
Prepare for H12-311-V3.0 with more than an answer.
- Exam fee
- $200 USD
- Level
- Associate
- Valid for
- 3 years
Domains covered on the exam 6
- WLAN Fundamentals25%
- WLAN Networking20%
- Wi-Fi 6 Technology20%
- WLAN Configuration15%
- WLAN O&M and Troubleshooting10%
- Antenna Technology and Deployment10%
- 1
A technician is using Huawei's eSight Network Management System to monitor a WLAN. They notice several APs are showing a high channel utilization alarm on the 2.4 GHz band. Which of the following is the LEAST likely cause of this high utilization?
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Correct answer: D
High channel utilization is an RF-layer issue, meaning the wireless medium is busy. This can be caused by legitimate Wi-Fi traffic (many clients), co-channel/adjacent-channel interference from other APs, or non-Wi-Fi interference (microwaves, Bluetooth). A misconfigured VLAN mapping is a Layer 2 configuration issue. It would cause connectivity problems (like clients not getting an IP address or reaching the network) but would not directly cause high RF channel utilization.
- 2
An engineer is configuring a mobility group between two Huawei ACs located in different buildings to facilitate seamless roaming. Which statement about Huawei mobility groups is correct?
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Correct answer: C
A common misconception is that all ACs synchronize all STA information constantly. In reality, this is inefficient. When a STA roams to a new AP managed by a different AC within the same mobility group, the new (foreign) AC detects the STA and queries the original (home) AC for the STA's context (security keys, session info, etc.). This allows for a fast and seamless roam without requiring a full re-authentication. The ACs do not maintain a full, real-time database of every STA connected to the entire group.
- 3
A system administrator needs to check the status of all Fit APs connected to a Huawei AC using the command-line interface. Which command should be used?
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Correct answer: C
The
display ap allcommand is the standard Huawei VRP command used on an Access Controller to view a summary of all connected Access Points. The output typically includes the AP's ID, MAC address, group, type, state (e.g., normal, fault), and IP address, making it a primary tool for troubleshooting AP connectivity. - 4
True or False: In Huawei's WLAN architecture, a single VAP (Virtual Access Point) profile can be configured to support multiple SSIDs.
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Correct answer: B
The statement is false. In Huawei's configuration hierarchy, there is a one-to-one relationship between a VAP profile and an SSID profile. A VAP profile is created to define the service parameters (like security, forwarding mode, VLAN) for a single SSID. To broadcast multiple SSIDs from an AP group, you must create multiple VAP profiles, each bound to a different SSID profile.
- 5
A client device is connected to an SSID configured for direct forwarding. Which of the following statements accurately describes how its data traffic is handled?
graph TD STA[Client Device] -- Wi-Fi --> AP[Access Point] AP -- CAPWAP Control --> AC[Access Controller] AP -- Data --> SW[Local Switch] SW --> Router[Router] Router --> Internet((Internet)) AC -- Mgmt --> RouterShow answer details
Correct answer: B
Direct forwarding, also known as local forwarding, separates the data plane and control plane. The Fit AP forwards user data packets directly to the connected switch infrastructure without sending them to the AC. Only management and control traffic (like association requests, authentication, and AP status) is encapsulated in the CAPWAP tunnel and sent to the AC. This reduces the load on the AC and minimizes latency for user traffic.
- 6
A hospital is deploying a new Huawei WLAN for its patient monitoring system, which uses low-power IoT devices that transmit small amounts of data infrequently. The primary goal is to maximize the battery life of these devices. Which Wi-Fi 6 feature should the network administrator prioritize in the configuration?
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Correct answer: C
Target Wake Time (TWT) is a Wi-Fi 6 feature specifically designed to improve power efficiency for client devices, especially IoT devices. It allows the AP to negotiate specific times for devices to wake up and transmit data, enabling them to remain in a low-power sleep state for extended periods. OFDMA is for high-density efficiency, BSS Coloring reduces interference, and 1024-QAM increases data rates, but TWT directly addresses the goal of maximizing battery life.
- 7
A network administrator is troubleshooting a newly installed Huawei Fit AP that is failing to come online. The AP receives an IP address from a DHCP server on VLAN 10, but the AC is located in the data center on VLAN 20. The administrator confirms Layer 3 reachability by successfully pinging the AC from a laptop connected to the AP's port. Which DHCP option must be configured on the DHCP server to allow the AP to discover the AC across different subnets?
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Correct answer: B
When a Fit AP is on a different subnet from its AC, it cannot use Layer 2 broadcast methods for discovery. DHCP Option 43 is the standard method used to provide vendor-specific information, such as the IP address(es) of an AC, to a client. The AP, upon receiving its IP address, will also receive the AC's IP address via Option 43 and can then initiate the CAPWAP tunnel establishment process. Option 60 is for the Vendor Class Identifier, Option 66 is for a TFTP server, and Option 150 is for a Cisco TFTP server.
- 8
A warehouse deployment requires WLAN coverage down long, narrow aisles flanked by tall metal shelving. The goal is to provide a strong, focused signal along each aisle while minimizing signal bleed and interference to adjacent aisles. Which type of antenna is most suitable for the APs in this scenario?
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Correct answer: B
Directional antennas, such as panel or Yagi antennas, focus RF energy in a specific direction. This is ideal for long, narrow spaces like warehouse aisles, as it maximizes signal strength within the aisle and reduces co-channel interference with APs in adjacent aisles. An omnidirectional antenna would waste signal by broadcasting it into the metal shelves, causing high reflection and poor coverage down the aisle. Smart antennas are more complex and expensive, while an isotropic antenna is a theoretical reference, not a practical device.
- 9
A user reports being unable to connect to the corporate WLAN. The network administrator uses the
display wlan clientcommand on the Huawei AC but does not see the user's MAC address listed. The user is in an area with a strong signal. The administrator suspects an authentication failure. Which of the following are common causes for a client to fail the 802.1X authentication phase? (Select TWO)Show answer details
Correct answer: A, C
- 10
In a Huawei WLAN architecture, the management VLAN is used for CAPWAP control packets, while service VLANs are used for user data traffic. In which forwarding mode are BOTH management packets and user data packets encapsulated within the CAPWAP tunnel and tagged with their respective VLANs?
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Correct answer: B
In tunnel forwarding mode, all traffic from the client, including user data, is encapsulated within the CAPWAP tunnel and sent to the AC. The AC then de-encapsulates the traffic and forwards it to the upstream network. This allows for centralized control, security policies, and management. In direct forwarding, only control packets are sent to the AC via the CAPWAP tunnel; user data is forwarded directly by the AP onto the local wired network.
