Going wireless generally requires a broadband Internet connection into your home, called an “access point,” like a cable or DSL line that runs into a modem. To set up the wireless network, you connect the access point to a wireless router that broadcasts a signal through the air, sometimes as far as several hundred feet. Any computer within range that’s equipped with a wireless client card can pull the signal from the air and gain access to the Internet. The downside of a wireless network is that, unless you take certain precautions, anyone with a wireless-ready computer can use your network. That means your neighbors, or even hackers lurking nearby, could “piggyback” on your network, or even access the information on your computer. And if an unauthorized person uses your network to commit a crime or send spam, the activity can be traced back to your account.