Wireless Defined

Wireless has been, and will be, a part of everyday life and computing in a couple of different forms. The first is infrared or light wave communications between specific devices and a virtual port on a PC. Other implementations use radio communications from National Semiconductor’s Airport modules, which essentially create an over radio null modem extension between two PCs’ serial ports for use with programs such as pc Anywhere or LapLink, through cellular phone aware modems, to a variety of 400 MHz, 900 MHz, and 2400 MHz (2.4 GHz) radio connections. All of these have in common the benefit of not having to use a variety of different connectors, adapters, and wires, to transfer data between one device and another.

[Reference] Installing, Troubleshooting, and Repairing Wireless Networks ( Jim Aspinwall )