Troubleshooting LAN/WAN, TCP/IP, VLANs, OSPF, EIGRP. System maintenance, application installation, hardware setup. Managing tickets and monitoring systems (PRTG, ). Backup management, vendor coordination, escalation handling. Fortinet, Sophos, Gjshield firewalls, VPN (IPSec, SSL) Subnetting, IP Addressing, cable crimping FortiGate Firewall Configuration: Policies, NAT, Security profiles VPN Setup: Site-to-Site IPSec, SSL VPN UTM: IPS, Application Control, Web Filtering Antivirus: Symantec, Quick Heal, Kaspersky Monitoring: FortiAnalyzer, FortiView, PRTG, WhatsApp Gold, Wireshark TCP/IP, DNS, DHCP, HTTP/S, FTP, SNMP VLAN, STP, OSPF, EIGRP, Static Routing Windows Server roles, Group Policy Management Hyper-V virtualization setup Backup & Recovery, Disaster Recovery Patch Management (WSUS, manual scripting)