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| Section | Weight | Objectives |
|---|---|---|
| Underlying Transport Network Technologies | 15% | - Overlay Network Technologies (VXLAN, NVGRE) - Spine-Leaf Architecture - Underlay Network Planning and Design |
| VXLAN and EVPN Technologies | 20% | - VXLAN Principles and Deployment - BGP EVPN Fundamentals - EVPN Route Types and Applications - Multi-Site VXLAN EVPN Deployment |
| CloudFabric Data Center Network Solution Overview | 10% | - CloudFabric Solution Components and Functions - Data Center Network Challenges and Trends - Huawei CloudFabric Solution Architecture |
| CloudEngine Switch Configuration | 20% | - CloudEngine OS Overview - VXLAN Configuration on CloudEngine - QinQ and VLAN Extension Technologies - BGP EVPN Configuration |
| Data Center Interconnect | 10% | - EVPN Multi-Site Solution - DCI Technology Overview - Cross-Domain VXLAN Extension |
| iMaster NCE-Fabric Management | 15% | - Overlay Network Configuration - Underlay Network Automation Deployment - Network Simulation and Verification - Fabric Management Concepts |
| Data Center Network Security and O&M | 10% | - Traffic Audit and Monitoring - iMaster NCE-FabricInsight Analytics - Network Troubleshooting Methods - Network Security Policies |
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質問 # 11
In the computing scenario of Huawei CloudFabric Solution, which of the following services are optional for controller interconnection? (Select All that Apply)
正解：A、D
解説：
In Huawei's CloudFabric Solution, the iMaster NCE-Fabric controller manages the network in computing scenarios (e.g., virtualized environments). Controller interconnection with external systems can be mandatory or optional depending on functionality. Let's evaluate each option:
A . Interconnection with FabricInsight: This is optional. FabricInsight is an analytics and assurance tool that enhances visibility and troubleshooting but is not required for basic controller operations in the computing scenario. OPTIONAL.
B . Interconnection with the authentication server: This is mandatory. Authentication servers (e.g., RADIUS, TACACS+) are essential for securing access to the controller and managed devices, a core requirement in computing scenarios. NOT OPTIONAL.
C . Interconnection with eSight: This is optional. eSight is a network management platform that provides additional monitoring and management capabilities, but it is not necessary for core controller functionality. OPTIONAL.
D . Interconnection with the VMM (Virtual Machine Manager): This is mandatory. Interconnection with a VMM (e.g., FusionCompute, OpenStack) is required to manage virtualized computing resources and orchestrate network services in the computing scenario. NOT OPTIONAL.
Thus, A (Interconnection with FabricInsight) and C (Interconnection with eSight) are optional services for controller interconnection.
質問 # 12
Both M-LAG and stacking technologies can overcome the disadvantages of traditional DCNs.
However, M-LAG is a better choice to ensure 24/7 service continuity.
正解：A
解説：
Traditional data center networks (DCNs) often suffer from single points of failure, limited scalability, and traffic bottlenecks. Both M-LAG and stacking address these issues, but their suitability for 24/7 service continuity differs.
M-LAG Benefits: M-LAG (Multi-Chassis Link Aggregation) on Huawei CE switches allows two devices to act as a single logical switch, providing active-active forwarding, high availability, and rapid failover (e.g., via peer-link synchronization). It supports non-stop service during device failures, making it ideal for 24/7 continuity.
Stacking Benefits: Stacking combines multiple switches into a single logical unit, sharing a control plane. While it improves scalability and simplifies management, a stack master failure can disrupt the entire stack unless redundancy is perfectly configured, potentially affecting service continuity.
Comparison: M-LAG's decentralized design and real-time synchronization offer better fault isolation and recovery compared to stacking, where a master switch failure impacts the stack.
Huawei documentation highlights M-LAG's superiority for high-availability scenarios like 24/7 operations.
The statement is TRUE (A) because M-LAG is indeed a better choice than stacking for ensuring
24/7 service continuity due to its robust failover and redundancy features.
質問 # 13
A company designs a modern Huawei data center emphasizing automation, scalability, and simplified operations. Which architecture best aligns with these objectives?
正解：B
解説：
A spine-leaf EVPN VXLAN architecture provides scalable Layer 3 forwarding, tenant isolation, efficient ECMP load balancing, workload mobility, and centralized control-plane learning. These characteristics make it the preferred architecture for modern cloud-oriented data center deployments.
質問 # 14
Which of the following technologies are Layer 4 load balancing technologies? (Select All that Apply)
正解：B、C、D
解説：
Layer 4 load balancing operates at the transport layer (OSI Layer 4), using TCP/UDP protocols to distribute traffic based on information like IP addresses and port numbers, without inspecting the application-layer content (Layer 7). Let's evaluate each option:
A . Nginx: Nginx is a versatile web server and reverse proxy that supports both Layer 4 and Layer 7 load balancing. In its Layer 4 mode (e.g., with the stream module), it balances TCP/UDP traffic, making it a Layer 4 load balancing technology. This is widely used in Huawei's CloudFabric DCN solutions for traffic distribution. TRUE.
B . PPP (Point-to-Point Protocol): PPP is a Layer 2 protocol used for establishing direct connections between two nodes, typically in WAN scenarios (e.g., dial-up or VPNs). It does not perform load balancing at Layer 4 or any layer, as it's a point-to-point encapsulation protocol. FALSE.
C . LVS (Linux Virtual Server): LVS is a high-performance, open-source load balancing solution integrated into the Linux kernel. It operates at Layer 4, using techniques like NAT, IP tunneling, or direct routing to distribute TCP/UDP traffic across backend servers. It's a core Layer 4 technology in enterprise DCNs. TRUE.
D . HAProxy: HAProxy is a high-availability load balancer that supports both Layer 4 (TCP mode) and Layer 7 (HTTP mode). In TCP mode, it balances traffic based on Layer 4 attributes, making it a Layer 4 load balancing technology. It's commonly deployed in Huawei DCN environments. TRUE.
Thus, A (Nginx), C (LVS), and D (HAProxy) are Layer 4 load balancing technologies. PPP is not.
質問 # 15
BGP EVPN defines several types of BGP EVPN routes by extending BGP. Type ? routes are used to advertise host IP routes and external network routes. (Enter only digits.)
正解：
解説：
5
Explanation:
BGP EVPN (Ethernet VPN) extends BGP to provide control plane functionality for VXLAN overlays, including in Huawei's data center networks. EVPN defines several route types to advertise different types of information:
Type 1: Auto-discovery routes for EVPN instances.
Type 2: MAC/IP Advertisement routes for host reachability.
Type 3: Inclusive Multicast Ethernet Tag routes for multicast traffic.
Type 4: Ethernet Segment routes for multi-homing.
Type 5: IP Prefix routes for advertising host IP routes and external network routes, enabling inter-subnet and external connectivity.
The question specifies routes used to advertise "host IP routes and external network routes," which aligns with Type 5 routes. These routes carry IP prefix information and a Layer 3 VNI, facilitating Layer 3 routing within the EVPN domain or to external networks. Thus, the answer is 5.
質問 # 16
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