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| Section | Objectives |
|---|---|
| Topic 1: Deployment and Operations | - Data center network deployment planning - Monitoring and O&M practices - Troubleshooting methodologies |
| Topic 2: Data Center Virtualization and SDN | - SDN architecture and controller-based networking - Huawei CloudFabric concepts - Network virtualization and tenant isolation |
| Topic 3: Data Center Switching and Routing Technologies | - Layer 2/Layer 3 forwarding mechanisms - VXLAN and overlay networking - OSPF and BGP in data center environments |
| Topic 4: Data Center Security and Reliability Design | - Fault detection and recovery mechanisms - Security zoning and segmentation - DDoS mitigation and access control |
| Topic 5: Data Center Network Architecture Principles | - Scalability and capacity planning - High availability and redundancy design - Data center network topology design (Spine-Leaf) |
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質問 # 53
Incast traffic in distributed AI computing and in the distributed storage architecture are prone to cause network congestion.
正解：A
解説：
In Huawei data center networking, especially within Intelligent Lossless Data Center Network design, incast traffic is a well-known challenge in distributed systems such as AI computing clusters and distributed storage architectures .
In an incast scenario , a large number of servers simultaneously send traffic to a single destination (e.g., parameter server in AI training or storage node in distributed storage). This sudden aggregation of traffic can quickly overflow switch buffers , leading to packet loss, increased latency, and throughput degradation .
Huawei identifies incast as a primary cause of network congestion in modern data centers. To mitigate this, CloudFabric solutions implement advanced congestion control technologies such as:
PFC (Priority Flow Control) to prevent packet loss
ECN (Explicit Congestion Notification) for early congestion signaling
AI-driven traffic scheduling and load balancing
These mechanisms help build a lossless Ethernet fabric , which is essential for RDMA-based AI workloads and high-performance storage systems.
Therefore, the statement is TRUE , as incast traffic is indeed prone to causing congestion in such environments.
質問 # 54
NetEco6000 management system can provide which of the following types of access control card readers for installation on the room doors of the computer room? (Multiple choice)
正解：A、B、C、D
質問 # 55
(What are the application scenarios of the overlay network?)
正解：A、B、C、D
解説：
Huawei data center design documents clearly state that overlay networks (typically based on VXLAN EVPN) are highly versatile and support multiple application scenarios across modern and traditional environments.
In private cloud scenarios , overlay networks enable resource pooling and seamless data center interconnection, allowing flexible workload migration and multi-tenant isolation. For traditional IDC hosting services , overlays provide improved scalability and tenant isolation compared to VLAN-based designs, making them suitable for legacy-to-cloud evolution.
In public cloud environments (IaaS/PaaS/SaaS) , overlay networks are essential for large-scale multi-tenancy, enabling logical network segmentation, automation, and elastic service provisioning. Similarly, in NFV cloud scenarios , overlays integrate with SDN and NFV architectures to support virtualized network functions, service chaining, and dynamic service deployment.
Huawei CloudFabric emphasizes that overlay technology is not limited to a single use case but is a foundational technology across all modern data center architectures. Therefore, all listed options are valid application scenarios.
質問 # 56
Regarding the adjustable battery of UPS5000-E, when one battery is damaged, at least () batteries need to be removed. Then set the corresponding number of batteries on the monitoring panel.
正解：B
質問 # 57
How many power modules does the FusionModule2000 integrated UPS50K model support at most?
正解：D
質問 # 58
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