What is a computer modem and what is it used for?

A computer modem is a device that allows computers to communicate over a telephone line or cable connection. The term modem stands for modulator-demodulator, which describes the device's function of converting digital signals to analog signals for transmission over phone lines, and vice versa for receiving data.

Computer modems are used to connect computers to the internet, allowing them to send and receive data over the World Wide Web. Without a modem, a computer cannot access the internet, send emails or participate in online activities. Modems come in various types and speeds, and the type you need depends on your internet service provider and the type of connection available in your area.

There are two types of modems: dial-up modems and broadband modems. Dial-up modems are the oldest type and work by dialing a phone number and connecting to the internet through the phone line. Broadband modems are faster and can be connected to the internet through a cable or satellite connection.

Modems have largely been replaced by routers in modern internet setups, which allow multiple devices to connect to the internet at the same time. However, modems are still used in some areas where broadband internet is not available.