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| Section | Objectives |
|---|---|
| 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 | - Scalability and capacity planning - Data center network topology design (Spine-Leaf) - High availability and redundancy design |
| Deployment and Operations | - Monitoring and O&M practices - Data center network deployment planning - Troubleshooting methodologies |
| Data Center Switching and Routing Technologies | - OSPF and BGP in data center environments - Layer 2/Layer 3 forwarding mechanisms - VXLAN and overlay networking |
| Data Center Virtualization and SDN | - Huawei CloudFabric concepts - Network virtualization and tenant isolation - SDN architecture and controller-based networking |
1. Which of the following is not an advantage of the distributed VXLAN gateway networking?
A) A leaf node can function as both a Layer 2 VXLAN gateway and a Layer 3 VXLAN gateway, supporting flexible deployment.
B) Leaf nodes only need to learn the ARP entries of the servers connected to them, reducing resource consumption.
C) A single device does not need to learn the ARP entries of all servers, and the network scalability is improved.
D) Inter-subnet traffic can be centrally managed, and gateway deployment and management are simple.
2. Which of the following are characteristics of distributed VXLAN gateways?
A) A leaf node can function as both a Layer 2 VXLAN gateway and a Layer 3 VXLAN gateway, supporting flexible deployment.
B) 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.
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) 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.
3. NETCONF provides a lock mechanism to prevent conflicts between multiple users ' configurations. SNMP does not provide such a mechanism when multiple users perform operations on the same configuration item.
A) TRUE
B) FALSE
4. Which of the following is not a characteristic of high-performance networks?
A) Zero packet loss
B) Low latency
C) Higher GPU computing power
D) High throughput
5. Multichassis Link Aggregation Group (M-LAG) bundles multiple physical links connecting ServerA (a device or host) to DeviceA and DeviceB into a logical link, and allows DeviceA and DeviceB to appear to ServerA as a single device, improving link reliability from card-level to device-level.
A) TRUE
B) FALSE
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: A,D | Question # 3 Answer: A | Question # 4 Answer: C | Question # 5 Answer: A |
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