Depending on the size and layout of your home, a mid-to-high-end router may provide all the Wi-Fi coverage you'll need, but for homes built with dense materials like brick, concrete, plaster, and metal, some level of signal degradation is almost a certainty. Likewise, homes with multiple floors and many walls are more susceptible to signal loss than a one-story home with an open floor plan. In some cases you can relocate your router to a central location to deliver a stronger signal to those areas that were previously out of reach (dead zones). In most homes, however, the router's location is tied to the room where the internet enters the house, which means relocating the router will likely require running Ethernet cable to the desired area. Range extenders provide a relatively easy way to deliver Wi-Fi without having to run cables.