The Internet is not an information network whose content can be censored effectively at national borders. Internet users in all foreign countries have access to everything available in the U.S., and vice versa. What the Internet is, is a vast international network linking hundreds of thousands of computers. It is used for exchanging information of every conceivable sort, and on a global scale. These computers are operated by governments, by schools and universities, by commercial and private organizations and most of all by individuals everywhere.
Any user can communicate with any other user, almost instantaneously.
Any user can put his views before a million others at almost no marginal expense. It provides the ultimate in freedom of speech. Yes, there is some pornography. As a percent of what's on the Internet, it's miniscule. It is the gravest sort of mistake to think of the Internet largely in terms of pornography, as some sensationalistic commentators have done.