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TCP/IP Guide by Charles M. Kozierok

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Chapter 42. OVERVIEW AND COMPARISON OF TCP AND UDP

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TCP/IP is the most important internetworking protocol suite in the world. It is the basis for the Internet and the "language" spoken by the vast majority of the world's networked computers. TCP/IP includes a large set of protocols that operate at the network layer and the layers above it. The suite as a whole is anchored at layer 3 by the Internet Protocol (IP), which many people consider the single most important protocol in the world of networking.

Of course, there's a bit of architectural distance between the network layer and the applications that run at the layers well above that layer. IP ...

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