Three-tier enterprise network topology using Huawei AR6700 exit router and S5735 L3 distribution switch to segment four departmental VLANs (Admin, Finance, R&D, Sales) across access-layer switches with wireless APs, plus a dedicated private cloud zone running Proxmox VE servers. Traffic flows from WAN/Internet through the DMZ-edge router to the distribution layer, which routes between VLANs and connects to access switches serving departmental endpoints and wireless clients. This architecture isolates departments by VLAN, centralizes monitoring via the monitoring server, and provides on-premises virtualization for business-critical applications like OA and Finance DB. Network administrators can fork this diagram on Diagrams.so to customize IP ranges, add additional VLANs, or adapt it for different Huawei switch models. The design demonstrates best practices for SME networks: clear layer separation, VLAN-based segmentation, centralized wireless control, and integrated private cloud infrastructure.