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?
Answer and explanation
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.
Question 2
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?
Answer and explanation
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.
Question 3
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?
Answer and explanation
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.
Question 4
Multiple answers
A user reports being unable to connect to the corporate WLAN. The network administrator uses the display wlan client command 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)
Answer and explanation
Correct answers: A, C
Question 5
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?
Answer and explanation
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.
Question 6
True or False: In a Wi-Fi 6 network, OFDMA and MU-MIMO are mutually exclusive technologies and cannot be used simultaneously to serve multiple clients.
Answer and explanation
Correct answer: B
This statement is false. OFDMA and MU-MIMO are complementary technologies in Wi-Fi 6. OFDMA divides the channel frequency into smaller Resource Units (RUs) to serve multiple users with small packets simultaneously. MU-MIMO uses multiple spatial streams to serve different users at the same time. They can be used together; for example, an AP can allocate different RUs to different groups of users, and within some of those RUs, it can use MU-MIMO to serve multiple users simultaneously.
Question 7
A financial services firm is implementing a new WLAN with the highest security standards. They want to use WPA3-Enterprise for authentication. What is the primary authentication method used by WPA3-Enterprise to provide robust security?
Answer and explanation
Correct answer: D
WPA3-Enterprise mode uses the IEEE 802.1X framework for authentication, which provides per-user, per-session authentication typically via a RADIUS server. This is the standard for enterprise-grade security. SAE (Simultaneous Authentication of Equals) is the technology that replaces PSK in WPA3-Personal mode. MAC Address Filtering is a much weaker form of access control and not the primary method for WPA3-Enterprise.
Question 8
A junior administrator is configuring a new VAP profile on a Huawei AC6508. They need to associate an existing SSID profile named 'Corp-WiFi' and a security profile named 'WPA2-Ent' to this new VAP profile. Which command sequence correctly achieves this?
Answer and explanation
Correct answer: A
The correct procedure is to first enter the VAP profile view using vap-profile name . From within this context, you then bind the existing SSID profile using the ssid-profile command and the security profile using the security-profile command. The other options use incorrect commands or an incorrect order of operations.
Question 9
Case Study:
Global Logistics Inc. operates a large distribution center with a mix of office space and warehousing. They recently upgraded their WLAN to a Huawei solution with a central AC6800V and numerous AirEngine Fit APs. The network is segmented into two main SSIDs: 'GLI-Corporate' for employees and 'GLI-Guest' for visitors.
The 'GLI-Corporate' SSID uses WPA2-Enterprise with 802.1X authentication against a RADIUS server. Corporate user traffic is configured for tunnel forwarding to the central AC for inspection by a firewall before reaching the internal network. This SSID is mapped to VLAN 100.
The 'GLI-Guest' SSID uses Portal authentication. To minimize load on the central AC and the core network, the network architect decided that guest traffic should be sent directly from the APs to a dedicated internet gateway. This SSID is mapped to VLAN 200.
During a network audit, a security consultant questions the forwarding mode choice for the guest network, citing potential security risks of allowing traffic directly onto the local switch infrastructure from the APs. The architect needs to justify the design choice based on performance and scalability.
Which forwarding mode was implemented for the 'GLI-Guest' SSID, and what is its primary advantage in this scenario?
Answer and explanation
Correct answer: B
The scenario explicitly states that guest traffic should be sent 'directly from the APs to a dedicated internet gateway' to 'minimize load on the central AC'. This describes direct forwarding (also known as local forwarding). Its main benefit in this context is offloading the data plane from the AC, preventing the AC from becoming a bottleneck for high-volume guest internet traffic and improving overall WLAN scalability.
Question 10
What is the primary function of an antenna in a wireless communication system?
Answer and explanation
Correct answer: B
The fundamental purpose of a transmitting antenna is to act as a transducer that converts electrical energy in the form of guided waves traveling along a transmission line (like a coaxial cable) into electromagnetic waves that can propagate through free space. Conversely, a receiving antenna performs the reverse function. While antennas have gain, they do not actively amplify power like an amplifier; they focus existing power. They do not modulate or demodulate signals.
