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17 TROUBLESHOOTINGWhen your network is working properly, it s all but invisible; you can send and receive files through the network between any pair of computers or other connected devices. But when a connection fails, or one of your users can t find a network node, or any of a truly amazing number of other possible problems occurs, as the local network expert, it s your job is to fix it. Network problems always have a specific cause (or combination of causes), even if that cause is not obvious. Too often, a network error message will say something like ask your network manager for assistance. But when the network manager is you,that message doesn t tell you how to solve the problem . This chapter offers some tools and methods that will help you identify and solve most network Know-How(C) 2009 by John Ross240 Chapter 17 General Troubleshooting TechniquesThe key to successful troubleshooting is to follow a logical problem -solving process, rather than simply trying things at random until you stumble upon the correct solution to your problem .

Most problems offer some kind of hint about their location: If just one computer’s connection to the network has failed, but all the others work properly, the problem is probably in that computer or its network link. But if nobody on the network can connect to any other computer or to the

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