Gaming, watching videos, buying music, and web browsing all depend on it.
What Is a Modem, and Why Do I Need One?
However, transmitting the binary zeroes and ones of a data stream over long metal strands isn’t easy.

Zoom Telephonics / Amazon
Zoom Telephonics / Amazon
Instead, the signal is sent as either high or low.
These are translated to the ones and zeroes that computers expect.
On its own, a modem connects your home to that outside online grid.

Motorola, Inc. / Amazon
It is identified by yourIP address, which yourinternet service providerassigns.
That’s where a router comes in.
What Is a Router, and Why Do I Need One?
Arouterfocuses on local area networking.
Using 2-in-1 Modems/Routers
Modems and routers don’t need to be separate physical devices.
Some modems support built-in routing capability.
Furthermore, a single equipment may be less expensive than buying a modem and router.
Most modern cable and DSL providers offer gateway modems by default.