Final answer:
Wardriving is the term used to describe the act of driving around a city to locate WLANs, which can be for mapping network coverage or finding networks to exploit.
Step-by-step explanation:
The act of locating WLANs (Wireless Local Area Networks) while driving around a city is known as Wardriving. This involves an individual driving around with a laptop or a mobile device to detect wireless networks, often mapping the location of accessible networks and their security levels. This practice can be used for benign purposes such as mapping network coverage or for more malicious activities like finding unsecured networks to exploit.