Have a look at the >
iMac (Late 2006) - Technical Specifications
Look down the specification page to "Communications"
Built-in 54-Mbps AirPort Extreme Card (802.11g standard) (3)
Built-in Bluetooth 2.0+EDR (Enhanced Data Rate) module (1)
Built-in 10/100/1000 BASE-T Gigabit Ethernet (RJ-45 connector)
Works with 56K V.92 Apple USB Modem (sold separately)
17" iMac Intel Core Duo - 1.5GB Ram - Mac OS X (10.4.10) - Maxtor 300GB FireWire - Creative Inspire 2.1 - 2G Nano