ethernet ip , profinet , risk registers , Opc, Firewalls, Cisco Switches, Routers, patch management plans, industrial network engineering, rtu, security philosophy documents, network architecture diagrams, Nozomi, IEC 62443, Claroty, 800xA ICSS, Belden, Modbus TCP, system hardening guidelines, backup restore procedures, OT cybersecurity, Dcs, profibus, PMS network architecture, OPC UA