Before We Get to the Wireless Bit, What the Heck Is a LAN?
The chapter title says we will teach you how wireless LANs work, so it is probably a good idea to start off with a brief description of what a LAN is—nothing overly technical, just some background information that may come in handy later.
A local-area network, or LAN, is just what you think it might be, based on the name: a network connecting computers in a small or localized area. This area can be a house, a small office, or a floor of a building in a big office.
LANs form the basic building blocks of large-scale computer networks. LANs connect to other LANs to form larger corporate or institutional networks. These networks connect to larger networks that span large geographic areas. ...