Although the World Wide Web is the most popular application, other Internet applications are widely used. For example, the Telnet application enables a user to interactively access a remote computer. Telnet gives the appearance that the userís keyboard and monitor are connected directly to the remote computer. For example, a businessperson who is visiting a location that has Internet access can use Telnet to contact their office computer. Doing so is faster and less expensive than using a dial-up modem.
Another application, known as the File Transfer Protocol (FTP), is used to download files from an Internet site to a userís computer. The FTP application is often automatically invoked when a user downloads an updated version of a piece of software. Applications such as FTP have been integrated with the World Wide Web, making them transparent so that they run automatically without requiring users to open them. When a Web browser encounters a URL that begins with ftp:// it automatically uses FTP to access the item.
The Internet can also be used to transfer telephone calls using a computer with a microphone and speakers or a phone with a special adapter. Calls made in this way to computers or telephones that also connect to the Internet are often free.