Difference Between Modem and Router
A modem connects your home to the internet by translating signals from your ISP. A router connects your devices to each other and to the modem, creating your local network. Most people need both. Combo devices (modem-routers) combine both functions in one unit but may offer less flexibility. See also: WiFi vs Bluetooth.
Key Takeaways
- A modem (modulator-demodulator) is your gateway to the internet.
- Fiber internet connections use an ONT (Optical Network Terminal) instead of a traditional modem.
- You can use your own modem/router instead of renting from your ISP, often saving money over time.
Explanation
A modem (modulator-demodulator) is your gateway to the internet. It converts the signal from your internet service provider (cable, DSL, or fiber) into data your devices can use. Without a modem, you have no internet connection.
A router creates and manages your home network. It assigns IP addresses to your devices, directs traffic between them, and shares the modem's internet connection among all devices. Routers also provide WiFi capability for wireless connections.
Many ISPs provide combo devices that combine modem and router functions. While convenient, separate devices often offer better performance, more features, and easier troubleshooting. Upgrading one component does not require replacing both.
Things to Know
- Fiber internet connections use an ONT (Optical Network Terminal) instead of a traditional modem.
- You can use your own modem/router instead of renting from your ISP, often saving money over time.
- Mesh WiFi systems are routers and typically still require a modem.