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Sams Teach Yourself Network Troubleshooting in 24 Hours, Second Edition by Jonathan Feldman

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Hour 3. Documentation: Your Essential Discovery Tool

I am always at a loss to know how much to believe of my own stories.

——Washington Irving, Tales of a Traveller

Would you start out on a car trip in a strange country without a map? Would you simply presume that you’ll figure it out when you get there? Of course you wouldn’t, but this is what people do every day when they fail to document their ever expanding networks.

When it comes time to troubleshoot, those who don’t have a map to go by just shrug and shake their heads. Undocumented networks are mostly incomprehensible. You need some method of getting your bearings, and network documentation can be an invaluable compass in what can be a sea of confusion.

This goes for an existing network ...

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