Business infrastructure, 4 layers, modern enterprise architecture, sleek lines, metallic materials, futuristic atmosphere, high-tech devices, servers, mainframes, database systems, application platforms, presentation tiers, cloud computing, virtualization, abstraction, scalability, reliability, security measures, backup systems, disaster recovery, firewalls, intrusion detection, access control, authentication protocols, authorization mechanisms, data encryption, secure sockets, network architecture, LAN, WAN, Wi-Fi, routers, switches, gateways, network topology, star-bus-tree-mesh, fiber optics, coaxial cables, 3D visualization, isometric view, abstract shapes, neon lights, futuristic ambiance.