42 Design and configuration of data networks consisting of computers, routers, switches, video conferencing equipment, printers, servers, storage area networks and firewalls; technical support services, namely, troubleshooting of computer hardware and software problems including computers, routers, switches, video conferencing equipment, printers, servers, storage area networks and firewalls; technical support, namely, monitoring of data network systems consisting of computers, routers, switches, video conferencing equipment, printers, servers, storage area networks and firewalls