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Huawei H19-402_V1.0 Exam Syllabus Topics:

Section	Objectives
Data Center Switching and Routing Technologies	- OSPF and BGP in data center environments - VXLAN and overlay networking - Layer 2/Layer 3 forwarding mechanisms
Deployment and Operations	- Troubleshooting methodologies - Monitoring and O&M practices - Data center network deployment planning
Data Center Security and Reliability Design	- DDoS mitigation and access control - Fault detection and recovery mechanisms - Security zoning and segmentation
Data Center Network Architecture Principles	- Data center network topology design (Spine-Leaf) - Scalability and capacity planning - High availability and redundancy design
Data Center Virtualization and SDN	- Huawei CloudFabric concepts - Network virtualization and tenant isolation - SDN architecture and controller-based networking

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Huawei H19-402_V1.0最新関連参考書 & H19-402_V1.0試験

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Huawei HCSP-Presales-Data Center Network Planning and Design V1.0 認定 H19-402_V1.0 試験問題 (Q43-Q48):

質問 # 43
AHU can reduce PUE by applying natural cooling in high latitude areas, and can replace chilled water solutions as the main solution for large data centers.

A. True
B. False

正解：A

質問 # 44
Which of the following are characteristics of distributed VXLAN gateways?

A. A distributed VXLAN gateway (leaf node) only needs to learn the ARP entries of servers connected to it, whereas a centralized Layer 3 VXLAN gateway needs to learn the ARP entries of all servers on a network. Therefore, the number of ARP entries supported is no longer a bottleneck on distributed VXLAN gateways, and the network scalability is improved.
B. A leaf node can function as both a Layer 2 VXLAN gateway and a Layer 3 VXLAN gateway, supporting flexible deployment.
C. Forwarding paths are not optimal. Inter-subnet Layer 3 traffic between devices connected to the same gateway in a data center must be transmitted to a unified Layer 3 gateway for forwarding.
D. The number of ARP entries supported is a bottleneck. A single Layer 3 gateway is used. For tenants whose traffic is forwarded by the Layer 3 gateway, ARP entries must be generated for the tenants on the Layer 3 gateway, but only a limited number of ARP entries are allowed by the Layer 3 gateway, which impedes data center network expansion.

正解：A、B

解説：
In Huawei CloudFabric VXLAN design, distributed gateway architecture is a key enhancement over traditional centralized gateway models, especially for large-scale data centers.
Option A is correct because distributed gateways (typically deployed on leaf nodes) only maintain local ARP
/MAC entries for directly connected hosts. This significantly reduces ARP table pressure compared to centralized gateways, where a single device must learn all entries. This improves scalability and performance , which is critical in multi-tenant environments.
Option C is also correct as Huawei leaf switches can simultaneously act as Layer 2 VXLAN gateways (bridging) and Layer 3 VXLAN gateways (routing) . This enables distributed inter-subnet routing directly at the access layer, reducing latency and improving east-west traffic efficiency.
Option B is incorrect because it describes a limitation of centralized gateways , where traffic must traverse a central node, leading to suboptimal paths. Distributed gateways eliminate this issue.
Option D is also incorrect as it again describes centralized gateway constraints, not distributed ones.
Thus, distributed VXLAN gateways provide better scalability, optimal forwarding paths, and flexible deployment , making A and C correct .

質問 # 45
What are the functions of Al-Robot? (Multiple choice)

A. Accompanying Visitors
B. Automatic Inspection
C. Remote inspection
D. Intelligent Identification
E. Temperature cloud map

正解：A、B、C、D、E

質問 # 46
The asset management module of the NetEco management system can manage the equipment in the computer room: Which of the following equipment is not within the management scope of the NetEco asset management module?

A. Server
B. Storage Devices
C. Router
D. Office computer

正解：D

質問 # 47
Which of the following network components in OpenStack interconnects with iMaster NCE-Fabric?

A. Cinder
B. Neutron
C. Nova
D. Keystone

正解：B

解説：
In Huawei CloudFabric solutions integrated with OpenStack, Neutron is the key component responsible for network service management and integration with external network controllers such as iMaster NCE-Fabric .
Neutron provides APIs for creating and managing network resources such as:
Networks (VXLAN/BD)
Subnets
Ports
Routers
iMaster NCE-Fabric integrates with Neutron via northbound APIs , allowing it to automatically translate cloud network requests into underlay and overlay configurations (e.g., VXLAN, EVPN, routing policies) on physical network devices.
Other components:
Nova (A) manages compute resources (VM lifecycle)
Keystone (B) handles authentication and identity services
Cinder (C) provides block storage services
These components do not directly interact with network controllers for fabric provisioning.
Huawei emphasizes tight integration between Neutron and iMaster NCE-Fabric to enable automated, policy- driven network deployment , which is essential for cloud data center operations.
Therefore, the correct answer is D (Neutron) .

質問 # 48
......

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