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

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CHAPTER 2 Networking Primer
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Ever wonder how the Internet really works? Most of us, at one time or another, have wondered what happens behind the scenes when surfing web pages, watching videos, sending e-mail, or downloading files. You know instinctively that there must be many devices linking you to the other computer, but how exactly is the connection made? What makes up a message, and how does it find its way through the seemingly chaotic ...

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