Cisco 3-tier architecture, modern data center, server racks, rows of blinking servers, colorful network cables, Cisco routers, switches, firewalls, ventilation system, air conditioning units, raised flooring, industrial lighting, reflective surfaces, glass doors, metal frames, complex infrastructure, high-tech equipment, futuristic ambiance, 3/4 composition, low-angle shot, warm and soft ambient lighting, subtle gradient effects.