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| Section | Objectives |
|---|---|
| Data Center Facility Overview | - Huawei Data Center Facility Solution Portfolio - Data Center Facility Concepts and Development Trends - Typical Data Center Scenarios and Requirements |
| Cooling System | - Cooling System Architecture and Design - In-Row and In-Rack Cooling Units - Free Cooling Technologies - Air-Cooled and Water-Cooled Chillers |
| Data Center Infrastructure Management (DCIM) | - DCIM System Architecture - Energy Efficiency Management - Monitoring and Alarm Management |
| Modular Data Center | - Design, Delivery, and Installation - Huawei FusionModule Series - Modular Data Center Concepts and Benefits |
| Power Supply and Distribution System | - Power Distribution Unit (PDU) and Power Distribution Architecture - Power Supply and Distribution System Architecture - UPS System Principles and Configuration - Battery Systems and Reliability |
>> H20-923_V1.0 Key Concepts <<
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NEW QUESTION # 70
In alarm management, the status can be identified by masking rules.
Answer: A,D
Explanation:
In Huawei alarm management,masking rulesare used to control how alarms are handled and displayed during specific conditions, such as planned maintenance, commissioning, device replacement, or known temporary abnormalities. When a masking rule is applied, the system can change how an alarm is classified so that O&M staff can distinguish between alarms that require immediate action and alarms that are expected or should be excluded from operational statistics. Two key statuses that masking rules can assign areMaintenanceandInvalid.Maintenanceindicates the alarm is generated during an approved maintenance activity (for example, power-off tests, sensor rewiring, cooling maintenance), so it is treated as expected and does not trigger normal escalation logic.Invalidindicates the alarm is not considered effective for operational follow-up-commonly used when a point is confirmed to be non-applicable, temporarily disabled, or its triggering condition is not meaningful to current operations. By contrast,ValidandStandardrepresent normal alarm handling states rather than outcomes specifically "identified by masking rules."
NEW QUESTION # 71
What is the primary purpose of hot aisle/cold aisle containment in data center cooling design?
Answer: C
Explanation:
Hot aisle/cold aisle containment physically separates cold air supplied to equipment intakes from hot air exhausted from equipment, preventing mixing and recirculation, which significantly improves cooling efficiency and reduces energy waste.
NEW QUESTION # 72
Which layout principle best aligns with Huawei data center facility design for improving cooling efficiency and reducing mixing of hot and cold air?
Answer: C
Explanation:
Huawei data center facility design emphasizes controlling airflow paths to raise cooling efficiency and stabilize IT inlet temperatures. The hot aisle/cold aisle layout creates a predictable airflow direction:
cold air is supplied to the front of IT racks (cold aisle), while hot exhaust air is isolated and returned to the cooling system (hot aisle). When aisle containment is added, it prevents hot and cold air from mixing, which directly improves cooling utilization, reduces overcooling demand, and lowers fan energy. This layout also supports more accurate temperature control, enabling higher supply air temperatures while still meeting server inlet requirements-an important lever for improving overall energy efficiency. Huawei modular and smart module concepts commonly standardize rack alignment, containment components, and sensor-based monitoring so the airflow system remains consistent as capacity scales. Compared with random rack placement or uncontrolled airflow, containment-based hot
/cold aisle planning delivers measurable operational stability, simpler troubleshooting, and better conditions for capacity expansion without redesigning the entire cooling path.
NEW QUESTION # 73
Which of the following can be used to start the inverter of the UPS5000-H?
Answer: C,D
Explanation:
For the Huawei UPS5000-H, inverter startup is executed through theUPS's own control interfaces, which provide the "Running Control / Inv. ON" operation with the required confirmations and permissions. TheUPS LCD (MDU touchscreen)supports inverter startup through menu operations such as selecting inverter start functions and confirming the action after authentication. TheUPS WebUIalso provides the same operational control path, where an operator logs in and issues theInv. ONcommand under the UPS monitoring/running control pages. These two interfaces are part of the UPS monitoring and control design and are explicitly used for commissioning and routine O&M actions.
By contrast,ECC(data center controller) andNetEco(management platform) are mainly used for site-level monitoring, alarm collection, visualization, reporting, and centralized management. While they can display UPS status and alarms (and may integrate with UPS data), inverter startup is defined as aUPS running control operationperformed on the UPS's LCD or WebUI control plane to ensure proper authorization, safety checks, and command traceability.
NEW QUESTION # 74
ECO mode is not recommended when the load is less than
Answer: D
Explanation:
ECO mode is designed to improve UPS efficiency by supplying the load mainly through the static bypass path when the mains is within the acceptable quality window, while keeping the inverter synchronized and ready to take over quickly if power quality degrades. However, when the load is too light, the overall operating characteristics of the UPS system are less favorable for ECO operation. At low load levels, the benefits of ECO in reducing conversion losses are smaller, and the system becomes more sensitive to frequent transfers caused by minor mains fluctuations, which can and operational risk. In addition, very light loads can reduce the effectiveness increase transfer of system self-check behaviors and may lead to less stable operating margins for parallel systems, power modules, and downstream distribution, depending on site conditions. Therefore, Huawei O&M guidance sets a practical threshold and states that ECO mode is not recommended when the load is lower than 20%, helping ensure stable operation, fewer unnecessary transfers, and better overall power supply reliability for critical loads.
NEW QUESTION # 75
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