This selection introduces more fundamental concepts that many users of the Web will already understand. The first general chapter titled "The Web" includes a rather theoretical discussion of "Publishing Webpages" that may be skipped. Also note that the chapter on the Domain Name System is quite technical and only the main idea needs to be understood. The chapter on Web Hosting establishes a fundamental understanding of how we move from functioning HTML and CSS files on our home computers to a functioning site on the Web. This topic will be addressed in more detail in the last unit, but a fundamental understanding of how these technologies work together to create the Web experience will be helpful background as you move through later lessons.