The campus network uses a spine-leaf architecture with 100G backbone and Gigabit desktop infrastructure, integrating data centers, office/equipment/production networks (w/factories), branches, DMZ, and security zones. Functional partitions deploy performance-tiered devices for specific business needs, ensuring cost-effectiveness, sustainability, and upgrade scalability. Security combines zone isolation, layered controls (virus protection, access/isolation, admission, auditing), and unified cloud-network-device governance to build a compliant security platform.