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| Section | Weight | Objectives |
|---|---|---|
| Data Center Network Security and O&M | 10% | - iMaster NCE-FabricInsight Analytics - Traffic Audit and Monitoring - Network Troubleshooting Methods - Network Security Policies |
| Data Center Interconnect | 10% | - EVPN Multi-Site Solution - Cross-Domain VXLAN Extension - DCI Technology Overview |
| VXLAN and EVPN Technologies | 20% | - Multi-Site VXLAN EVPN Deployment - BGP EVPN Fundamentals - VXLAN Principles and Deployment - EVPN Route Types and Applications |
| iMaster NCE-Fabric Management | 15% | - Network Simulation and Verification - Fabric Management Concepts - Underlay Network Automation Deployment - Overlay Network Configuration |
| CloudEngine Switch Configuration | 20% | - VXLAN Configuration on CloudEngine - BGP EVPN Configuration - CloudEngine OS Overview - QinQ and VLAN Extension Technologies |
| Underlying Transport Network Technologies | 15% | - Overlay Network Technologies (VXLAN, NVGRE) - Spine-Leaf Architecture - Underlay Network Planning and Design |
| CloudFabric Data Center Network Solution Overview | 10% | - Huawei CloudFabric Solution Architecture - Data Center Network Challenges and Trends - CloudFabric Solution Components and Functions |
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NEW QUESTION # 76
Which of the following can be deployed to enhance DC reliability? (Select All that Apply)
Answer: A,C,D
Explanation:
Reliability in Huawei's CloudFabric data centers is enhanced through various mechanisms. Let's evaluate each option:
A). Power supply redundancy: This is true. Redundant power supplies (e.g., dual PSUs) ensure uninterrupted operation during power failures, a key reliability feature. TRUE.
B). M-LAG (Multi-Chassis Link Aggregation): This is true. M-LAG provides high availability by allowing active-active forwarding and failover between switches, enhancing network reliability.
TRUE.
C). Monitor Link: This is false. Monitor Link is a Huawei feature for link status monitoring, not a direct reliability enhancement mechanism like redundancy or clustering. FALSE.
D). Controller cluster: This is true. A clustered SDN controller (e.g., iMaster NCE-Fabric) ensures high availability and failover, improving network management reliability. TRUE.
Thus, A, B, and D enhance DC reliability.
NEW QUESTION # 77
Which of the following statements is false about M-LAG deployment?
Answer: A
NEW QUESTION # 78
In the DCN architecture, spine nodes connect various network devices to the VXLAN network.
Answer: B
Explanation:
In Huawei's Data Center Network (DCN) architecture, particularly with the CloudFabric solution, the spine-leaf topology is a common design for scalable and efficient data centers. VXLAN (Virtual Extensible LAN) is used to create overlay networks, enabling large-scale multi-tenancy and flexible workload placement.
Spine Nodes' Role: In this architecture, spine nodes act as the backbone, interconnecting leaf nodes (which connect to servers, storage, or other endpoints) and facilitating high-speed, non-blocking communication. Spine nodes typically handle Layer 3 routing and serve as VXLAN tunnel endpoints (VTEPs) or connect to devices that do, integrating the physical underlay with the VXLAN overlay network.
Connection to VXLAN: Spine nodes ensure that traffic from various network devices (via leaf nodes) is routed efficiently across the VXLAN fabric. They provide the high-bandwidth, low-latency backbone required for east-west traffic in modern data centers, supporting VXLAN encapsulation and decapsulation indirectly or directly depending on the deployment.
Thus, the statement is TRUE (A) because spine nodes play a critical role in connecting the underlay network (various devices via leaf nodes) to the VXLAN overlay, as per Huawei's DCN design principles.
NEW QUESTION # 79
In EVPN, Type 5 routes are used only by hosts on a VXLAN network to access external networks.
Answer: A
Explanation:
EVPN (Ethernet VPN) is a control plane technology used with VXLAN to provide Layer 2 and Layer 3 services in data center networks, including Huawei's implementations. EVPN routes are categorized into types, with Type 5 routes (IP Prefix routes) serving a specific purpose:
Type 5 Routes: These routes advertise IP prefixes and are used for inter-subnet routing, allowing communication between different VXLAN Virtual Network Identifiers (VNIs) or between VXLAN networks and external networks. They carry a Layer 3 VNI and IP prefix information, enabling routers or gateways to perform Layer 3 forwarding.
Usage Scope: Type 5 routes are not limited to hosts on a VXLAN network accessing external networks. They are also used by network devices (e.g., gateways, routers) within the EVPN domain to facilitate routing between subnets, including intra-VXLAN communication. For example, a centralized gateway or distributed gateway can use Type 5 routes to route traffic within the data center or to external networks, not just host-initiated access.
The statement is FALSE (B) because Type 5 routes are not exclusively for hosts on a VXLAN network to access external networks; they support broader Layer 3 routing functions across the EVPN domain.
NEW QUESTION # 80
In the spine-leaf DCN architecture, the border leaf node and service leaf node can be deployed on the same device.
Answer: B
Explanation:
In Huawei's spine-leaf data center network (DCN) architecture, the topology consists of spine nodes (core) and leaf nodes (access/aggregation). Leaf nodes can serve different roles:
Border Leaf Node: Connects the DCN to external networks or other domains, handling Layer 3 routing.
Service Leaf Node: Connects to internal services (e.g., servers, VMs), often handling Layer
2/Layer 3 traffic.
In practice, a single physical device can be configured to perform both roles (border and service) if it has the necessary interfaces and routing capabilities. Huawei's CloudFabric documentation supports this flexibility, allowing a leaf switch to act as both a border and service node based on configuration (e.g., using VRFs or VXLAN gateways). This reduces hardware costs and simplifies deployment in smaller DCNs.
The statement is TRUE (A) because the border leaf and service leaf roles can be deployed on the same device in a spine-leaf architecture.
NEW QUESTION # 81
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