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

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Hour 4. The Delta Method: Identifying Network Change

The changes are small

“It ought to work,” he says, yet:

The network is down.

—The Mighty Quizro, The Law of Unintended Consequences

It can seem like gremlins are lurking in every server, wire center, and particularly in every Windows PC. Usually, however, what we attribute to gremlins is actually the result of a change. Frequently, this means that a user has changed something and subsequently has forgotten (or denied) making the change.

We all do this; we’re our own worst enemies. For example, say you install a new application on your computer, decide you don’t like it, forget to delete it, and then have trouble accessing your company’s intranet the next day.

If you’re lucky, you won’t forget ...

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