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Oracle® Web Application Programming for PL/SQL® Developers by Benjamin Rosenzweig, Solomon Morse, Melanie Caffrey, Susan Boardman

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Unit 1.1. Internet and Web Basics

The Internet

Ask the next person who says Internet what they mean by the term, and you may get a surprisingly vague reply. Simply put, the Internet is a decentralized, worldwide network of interconnected computers that communicate with each other in a standardized way. The computers are connected using modems and phone lines, cable lines, ISDN lines, Ethernet cards, and fiber-optic cables. To provide convenient wireless communication, infrared and radio waves are being used increasingly as well.

Physical connectivity is not enough to define the Internet. Communication would not be possible if these interconnected computers did not use a shared protocol for transmitting information. A protocol is a set of common ...

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