Multi-tier exam system network architecture with segregated VLANs across access, DMZ, core application, and data tiers. Traffic flows from exam workstations through an access switch and site router to a WAF/firewall perimeter, then load balancer distributing to core services including registration, exam management, and score calculation engines. The design isolates candidate databases, exam repositories, and legacy mainframe systems behind firewalls with dedicated middleware bridging modern web apps to DB2 backend infrastructure. This architecture demonstrates defense-in-depth principles, network segmentation, and secure integration patterns critical for high-stakes examination platforms. Fork and customize this diagram on Diagrams.so to adapt tier configurations, add redundancy, or model your institution's specific exam delivery topology.