A Wi-Fi enabled device such as a PC, game console, cell phone, MP3 player or PDA can connect to the Internet when within range of a wireless network connected to the Internet. The coverage of one or more interconnected access points — called a hotspot — can comprise an area as small as a single room with wireless-opaque walls or as large as many square miles covered by overlapping access points. Wi-Fi technology has served to set up mesh networks, for example, in London.[1] Both architectures can operate in community networks.[citation needed]

In addition to restricted use in homes and offices, Wi-Fi can make access publicly available at Wi-Fi hotspots provided either free of charge or to subscribers to various providers. Organizations and businesses such as airports, hotels and restaurants often provide free hotspots to attract or assist clients. Enthusiasts or authorities who wish to provide services or even to promote business in a given area sometimes provide free Wi-Fi access. Metropolitan-wide Wi-Fi (Muni-Fi) already has more than 300 projects in process.[2]

Wi-Fi also allows connectivity in peer-to-peer (wireless ad-hoc network) mode, which enables devices to connect directly with each other. This connectivity mode can prove useful in consumer electronics and gaming applications.

Wi-Fi allows LAN's(Local Area Networks) to be deployed without cabling for client devices, typically reducing the costs of network deployment and expansion. Spaces where cables cannot be run, such as outdoor areas and historical buildings, can host wireless LANs.

As of 2007 wireless network adapters are built into most modern laptops. The price of chipsets for Wi-Fi continues to drop, making it an economical networking option included in even more devices. Wi-Fi has become widespread in corporate infrastructures.


Wifi is a localized technology.  If you need wireless internet access only within your home or office then this is prefect for you.  Once you leave your home or office, you will not be connected to the internet unless you find a "Hot Spot".  A "Hot Spot" is a place where you can receive WiFi (802.11) signal and hook up to the internet thru another person's local network.  An example would be Starbucks.  Many places offer WiFi access but the majority of these places charge as much as $9.95 per day for you to connect.  If you will be leaving your local WiFi connection often - you would be financially better off to enroll in an EVDO service instead.  WIFi is not as secure as EVDO - so be careful.