A modem is the device that connects your home to the internet service your provider delivers through cable, fiber, or phone lines. Whether you rent one from your internet company or buy your own, the modem translates that incoming signal into data your router and devices can use. Understanding what modems do, how they differ, and which ones work with your provider helps you avoid paying rental fees or choosing equipment that won't function on your network.
These guides cover the practical questions that come up when you're shopping for or troubleshooting a modem: what speeds different models actually deliver, which modems work with which internet providers, how to tell if an older modem is slowing you down, and whether buying your own saves money over time compared to renting.