Right now, you're using the Internet to complete this training module. When you send an email, watch a YouTube video, browse the web, you're using the Internet. The Internet is simply a network of networks that connects millions of domestic, academic, business and government networks and is publicly accessible worldwide.

Smaller networks within the Internet carry information and services, such as email, MP3 music files, and web pages belonging to the World Wide Web (WWW). Consumers access the Internet through Internet Service Providers (ISP). For a monthly fee, customers are given a username, password and equipment to connect their computer and other devices to the Internet.

Since the Internet was first introduced in the early 1990s, it has become a daily activity for most Americans. Roughly 78% of Americans use the Internet every day, according to a May 2010 survey by the Pew Research Center's Internet and American Life Project. Through the Internet, people send and read emails, look up information on products they're interested in buying, watch videos, download music, play games and check in on social networking sites.