What is the difference between a modem and a router?

A modem and a router serve distinct but complementary functions in a network setup. A modem is a device that connects to your internet service provider, allowing access to the internet. It modulates and demodulates signals between your home and the service provider, converting digital data from your devices into an analog signal suitable for transmission over phone lines, cable systems, or fiber optics, and vice versa. On the other hand, a router is responsible for distributing that internet connection to multiple devices within your home or office. It creates a local network by assigning private IP addresses to each device, allowing them to communicate with one another and share the same internet connection. Routers can also offer additional features, such as network security, firewall protection, and wireless connectivity. In many cases, users may find modem-router combinations, which integrate both functions into one device, simplifying the setup process. Overall, while a modem connects to the internet, a router efficiently manages and shares that connection among connected devices.