If you've got bad wireless internet signal in your home, a Wi-Fi extender might be the answer to your woes — but they're not necessarily a perfect solution.

Expanding your network? You need something different from a regular router.

For most of us, the Wi-Fi signal usually ends at the back door. If that includes you, your laptop, projector or big-screen TV might be unable to connect to the internet for a big game or a movie night ...