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

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Hour 1. Understanding Networking: The Telephone Analogy

Every man is a damned fool for at least five minutes every day. Wisdom consists in not exceeding the limit.

——Elbert Hubbard

Nobody’s born knowing how anything works; and trying to understand the pieces and parts that make up a computer network can be pretty daunting, even to folks who are fairly computer literate in other areas. If you’re already familiar with basic network terms and concepts (like switch or protocol), you can skip this hour and move on to bigger and better things; if you’re not, this hour’s a good way to get comfortable with the basics of network technology. (The next hour lays out a more structured and formal model called the OSI model, which is also helpful.)

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