Remember, the Server, workstations, hubs, routers, and printers are all portable. Lock Up as many of the physical components as possible. Other issues that pose a problem are unattended workstations that are logged into the network, user-ids and passwords that are written down and displayed. Have a professional review fire control and theft deterrent equipment. The Rutgers University Police and Fire Departments offer free inspections of Security and Fire Protection systems relating to the computing environment at Rutgers .
Virus protection is also very important.
Servers should be scanned regularly and workstations should be scanned before they login to the network. Much of the physical security information above was adapted from the slide presentation of the February LAN administrator's meeting , the topic was Novell Security.