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Cisco A Beginner’s Guide Fifth Edition by Anthony Velte, Toby Velte

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CHAPTER 18 Troubleshooting Cisco Networks
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Keeping an internetwork going is a full-time job. As you saw earlier, problems emerge with such frequency that the industry invented routing protocols to deal with them automatically, not even waiting for a network administrator to intervene. They do a pretty good job, at least with problems that can be ameliorated by detouring to a new route. But changing routes is only a temporary solution. In ...

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