A modem and a router are both devices used in a computer network, but they have different functions. Here is the difference between a modem and a router:

Modem: A modem, derived from the term “modulator-demodulator,” is responsible for establishing the connection between your home network and the internet. It converts the signal from your internet provider into a format that your local network can understand. A modem uses different technologies, such as DSL, cable, fiber-optic, or satellite, to establish the internet connection. The modem is usually the first point of contact with the internet provider and is often directly connected to the main connection in your home.

Router: A router is responsible for routing network traffic within your home network. It acts as a junction between different devices in the network and determines how data is transmitted between these devices. A router can support wireless (Wi-Fi) and wired connections. It distributes internet traffic among the connected devices, allowing them to communicate with each other and access the internet. Moreover, a router often offers features such as network security, port forwarding, and network management settings.

In summary, a modem is the device that establishes the internet connection, while a router is the device that manages network traffic within your home network. In many cases, modems and routers are combined into a single device, known as a modem-router combo or gateway. This makes it easier for users as they only need to manage one device for both the internet connection and local network traffic.