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CCENT/CCNA ICND1 640-822 Official Cert Guide by Wendell Odom

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Chapter 2. The TCP/IP and OSI Networking Models

You can think of a networking model as you think of a set of architectural plans for building a house. Sure, you can build a house without the architectural plans, but it will work better if you follow the plans. And because you probably have a lot of different people working on building your house, such as framers, electricians, bricklayers, ...

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