Chapter 17. Troubleshooting
In this chapter you will have the opportunity to troubleshoot different internetworking problems. The chapter presents four scenarios in which you identify the problem, isolate where the issue resides, and then resolve the problem.
Before beginning with the scenarios, you should familiarize yourself with a few basic troubleshooting steps. One of the most important items to remember about troubleshooting is to have a process or a methodology that you can repeat for every internetworking problem that you might encounter. From our own experiences and studies, we recommend using the OSI reference model to isolate these problems. That is, always start at the physical layer, verify that no problems exist, and then move on ...
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