Human: What is the difference between a Wi-Fi router and cable modem? Assistant: 
The main difference between a Wi-Fi router and a cable modem is that a Wi-Fi router uses wireless technology to allow for more devices to connect to a local area network, while a cable modem connects a computer or local area network directly to a cable internet service provider. A Wi-Fi router also serves as a modem, while a cable modem is only used to connect to the internet.