Wireless internet access is the ability to connect to internet services without the use of cables. The connection is instead established through radio signals. Such signals are carried by invisible waves of light called radio waves. Many electronic devices are designed for wireless internet access. They include laptop and tablet computers, cell phones, and video game systems.
There are several forms of wireless internet access. Many homes and businesses maintain short-range, private wireless computer networks that can connect to the internet. Some cities and other large organizations offer public wireless networks with broader ranges. In addition, many devices can connect to the internet via cellular telephone networks.
Private wireless networks
typically make use of a technology called Wi-Fi. An internet-connected Wi-Fi device called a router communicates with nearby wireless devices via radio waves. The router thus establishes a type of network called a local area network (LAN). Users may be required to enter a password to gain access to the LAN. Some LAN’s do not require a password and can thus be accessed by anyone.
Public wireless networks
may be similar to private Wi-Fi networks. Many coffee shops and libraries, for example, offer Wi-Fi LAN access to customers or members. Larger public networks are provided using either a system of Wi-Fi routers or a technology called WiMAX. WiMAX networks transmit data via microwaves, which are high-energy radio waves. WiMAX often provides a broader area of coverage than does Wi-Fi. Areas where public wireless networks can be accessed are sometimes called hot spots.
Cellular telephone systems
also offer wireless internet access. Their data transfer speeds can rival those of Wi-Fi networks. Wireless internet access plans are marketed under such names as 3G (third generation), 4G (fourth generation), or LTE (long-term evolution).
See also Wireless communication .
