ethernet ip , profinet , secure remote access , Nat, Vpn, Wireshark, Zones, Vlans, Plc, industrial network troubleshooting, Segmentation, redundancy, DCS integration, basic packet analysis, IEC 62443, SCADA, Policy, conduits, high availability design, Modbus TCP, industrial switch configuration, IT OT segregation design, legacy system handling, OPC-UA, OT cybersecurity, plant network operations, Phoenix Contact mGuard firewall, ring topology