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Sams Teach Yourself Networking in 24 Hours, Fourth Edition by Uyless Black

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HOUR 1An Overview of Networking

What You’ll Learn in This Hour:

Definition of a computer network

Why we need computer networks

Components of a network

Different types of networks

Importance of the Internet

Computer networks have become part of our everyday lives. We use them to take cash from the local ATM. Whenever we send email or browse the Web, we rely on the world’s largest computer network, the Internet, to be our electronic mailman. Telemarketers, usually during dinner hour, use computer networks to sell us their wares. Our cable television stations rely on computer networks to transport programs onto our TV screens. What is a compelling example of their presence in our lives? Without computer networks, our cellular phone is ...

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