Summary
Hardware: PC, notebook, server, switch (Cisco Meraki/Aruba HPE), router, firewall (Sophos/Secure Point/Fortigate/Palo Alto), Wlan-Controller, accesspoint (Cisco/Lancom), NAS, UPS, Unifi, POS system, time tracking system (TimeCard), multifunction printer, monitor, scanner, peripherals, Microsoft Surface, tablet/smartphone (Android, iOS)
Network: LAN, WLAN, WAN, DHCP, DNS, TCP/IP, HTTP/HTTPS
Software / Cloud: Microsoft Office 2003-365, Microsoft SQL Server 2008, SCCM/ BMC Remmedy, Opsi, IYOPRO, GIMP, InterMapper, Pathfinder, Cisco Prime / Cisco Meraki Cloud Management, Open Systems MDR
Virtualization: Microsoft Server 2008-2019, VMware, vCenter, vSphere
Operating systems: Windows 10/11, Windows 2008 Enterprise, macOS, Linux Ubuntu, Suse Linux, Apple iOS, Android
Programming: HTML, CSS, C++, Java, Javascript, Powershell
Ticket /management systems: Jira, Confluence, Service Now, C-entron, Cherwell, Managed Services acmeo, Omnitracker