Can I use a router without a modem?

I understand the curiosity behind the question, "Can I use a router without a modem?" To clarify, let's break it down. A router's primary function is to distribute an existing internet connection to multiple devices within a network. The modem, on the other hand, is responsible for establishing that initial internet connection, translating data signals from your internet service provider (ISP) into a format that your devices can understand. So, when you ask if you can use a router without a modem, the answer is essentially no. Without a modem, your router wouldn't have an internet connection to distribute. The router relies on the modem to bridge the gap between your local network and the wider internet. However, if you're in a situation where you have access to a wired internet connection (like an Ethernet cable directly from an ISP or a network switch), you might be able to use a router without a traditional modem. In this scenario, the router would function as a switch and possibly a firewall, but it wouldn't be establishing the initial internet connection. But for most residential and small business setups, a modem is necessary to access the internet through a router.