Networks are no longer a tool for only nerds and wonks.
They have become an all-pervasive, business, educational, cultural, and social force for the mainstream of users. The largest computer network today is the Internet, comprising many national and international networks. The Internet is the working prototype of the information superhighway which will be a reality, sooner rather than later. E-mail addresses can be seen on business cards, letterheads, and television programs. The multimedia communication features of the Internet have also made the whole globe a marketplace.