Network Monitoring Tools: LogicMonitor, SolarWinds, PRTGProtocols: TCP/IP, DNS, DHCP, SNMPNetwork Security: Firewalls and VPNs, IDPS, Endpoint SecurityOperating Systems: Windows Server, Linux, MacNetworking Equipment: Routers, Switches, Firewalls, Access Point (Cisco, Palo Alto)Troubleshooting: Packet analysis, command-line tools, log analysisVirtualization Technologies: VMware, Hyper-VTicketing: Jira, ManageEngineDocumentation: Network diagrams, i----------- reports, standard operating procedures, knowledge base