How do you set up a lan?

This technology is becoming more and more popular, especially with the rapid emergence of small portable devices such as PDAs (personal digital assistants). For the home user, wireless has become popular due to ease of installation, and location freedom with the gaining popularity of laptops. For the business, public businesses such as coffee shops or malls have begun to offer wireless access to their customers, some are even provided as a free service. Large wireless network projects are being put up in many major cities, Google is providing a free service to Mountain View, California and has entered a bid to do the same for San Francisco, New York City has also begun a pilot program to cover all five boroughs of the city with wireless internet.