D-Link AirPro DWL-A520 Manual page 9

Wireless Basics (continued)
For the average residence, range should not be a problem. If you
experience low or no signal strength in areas of your home that you wish to
access, consider positioning the Access Point in a location directly between
the computers with wireless adapters that will be connected. Additional
Access Points can be connected to provide better coverage in rooms where
the signal does not appear as strong as desired.
Using radio frequency (RF) technology, WLANs (Wireless Local Area
Networks) transmit and receive data over the air, minimizing the need for
wired connections. Thus, WLANs combine data connectivity with user
mobility, and, through simplified configuration, enable movable LANs.