Users can connect to the Internet through a direct connection, local area network, high-speed data link, and other means. Individuals and small businesses access the Internet most commonly by setting up an account with an Internet service provider and using a telephone line and modem. High-speed data links such as ISDN and xDSL are more expensive options, but they provide much faster service than standard telephone line connections over a modem. Cable modems are quickly becoming a popular high-speed connection because they use coaxial cable already installed in many homes.
The Winsock standard specifies the Windows interface between TCP/IP applications and network connections. Users can mix and match Winsock-compatible applications and ensure they will work with the user's network connection to access the Internet. Internet application suites are available from many suppliers; they combine a full set of applications and drivers in a single package. Working on the Internet By connecting their networks to the Internet, companies are creating new ways to conduct business and for employees to work. Telecommuters work from remote locations by connecting to the company network via the Internet. Businesses that connect their networks to the Internet can use firewalls to prevent unauthorized users from accessing proprietary information. Intranets and extranets are internal networks based on TCP/IP and support the use of Web browsers.
The act of conducting business online is called e-commerce. At the consumer level, it is possible to buy a wide range of goods and services at Web sites. Many such sites accept different forms of payment online and provide a secure environment for transactions. At the corporate level, e-commerce technologies enable companies to form online partnerships, conduct business transactions online, and collaborate on projects.
