Apple iMac (Early 2006) - Manual (Page 51)

Chapter 3 Using Your iMac 51
Understanding AirPort Extreme Wireless Networking
Your iMac has built-in AirPort Extreme technology, which offers an easy and affordable
way to provide wireless Internet access. AirPort uses wireless local area network (LAN)
technology for wireless communication between multiple computers. You can access
the Internet, transfer files, play multiplayer games, and more.
How AirPort Provides Wireless Internet Access
With AirPort Extreme technology, your iMac makes a wireless connection to an AirPort
Express or AirPort Extreme Base Station, which is connected to the Internet via a
telephone line or a DSL modem or cable modem.
Connection to
the Internet
AC outlet AirPort Express AirPort antenna
DSL or cable
modem