Summary

Chapter 8: Fundamental Networks 55Figure 8-27VoIP PhonesIdentify and Apply Common PreventiveMaintenance Techniques Used for NetworksCertain common preventive maintenance techniques should continually be performed for anetwork to operate properly. If an organization has one malfunctioning computer, generallyonly one user is affected. But if the network is malfunctioning, many or all users will beunable to work.One of the biggest problems with network devices, especially in the server room, is heat.Network devices, such as computers, hubs, and switches, do not perform well when theyoverheat. Often, excess heat is generated by accumulated dust and dirty air filters. Whendust gathers in and on network devices, it impedes the flow of cool air and sometimes evenclogs fans. It is important to keep network rooms clean and to change air filters often. It isalso a good idea to have replacement filters available for prompt maintenance.Preventive maintenance involves checking a network’s various components for wear. Checkthe condition of network cables, because they are often moved, unplugged, and kicked.Many network problems can be traced to a faulty cable. You should replace any cables thathave exposed wires, that are badly twisted, or that are bent.Label your cables. This practice will save troubleshooting time later. Refer to wiring diagrams,and always follow your company’s cable-labeling guidelines.Troubleshoot a NetworkNetwork issues can be simple or complex. To assess how complicated the problem is, youshould determine how many computers on the network are experiencing the problem.