On-premises VLAN 10 (192.168.10.0/26) connects a Web Server and DB Server through a Layer 2 Switch in the same broadcast domain, with upstream Load Balancer and NAT Device integration. Traffic flows from the Load Balancer through the switch to both servers, and directly between Web and DB servers, while the Firewall confirms no blocking rules are active. The diagram isolates the suspected issue to ARP resolution failure, highlighting potential duplicate IP addresses or subnet mask mismatches within the /26 network segment. Network engineers can fork this diagram to document their own VLAN troubleshooting workflows, customize component details, and share findings with cross-functional teams.