WLAN

Wireless local-area networks use radio waves instead of a cable to connect a user device, such as a laptop computer, to a LAN. They provide Ethernet connections over the air and operate under the 802.11 family of specifications developed by the IEEE.

War driving

Typically refers to driving around with a wireless-enabled laptop and antenna to find places where it's possible to access exposed wireless networks. These are usually company networks that extend beyond the physical infrastructure of the company and are left unprotected.

War chalking