Some households may not benefit from the use of a Wi-Fi extender, while others could struggle to maintain a solid internet connection without it. But in some cases, using a Wi-Fi extender between a router and a weak-signal area may not be enough to deliver a noticeable difference. That's where the Ethernet port comes into play, as it can be used to directly connect with the router. By establishing a wired connection between the Wi-Fi extender and your router, it's possible to reduce some performance issues that can affect wireless connections. Ethernet ports can do several different things and when an Ethernet connection is used between the extender and your router, it can help improve the reliability of your home network.