What is a common application of modems in communication?

A common application of modems in communication is modulating and demodulating signals for data transfer. Modems serve as crucial devices that translate digital data from a computer into analog signals that can be transmitted over telephone lines, coaxial cables, or other communication media. This process, known as modulation, allows the digital information to be sent over distances that are otherwise unsupported for direct digital transmission.

Once the signal reaches its destination, the modem performs the reverse process called demodulation, converting the analog signal back into digital data that the receiving computer can understand. This bidirectional process enables effective communication between devices that use different types of signal formats.

In contrast, while connecting different networks is important in networking, it is usually done through routers rather than modems. Enhancing visual data relates more to display technologies, and increasing signal strength often involves amplifiers rather than modems specifically. Modems play an essential role in enabling a successful data transfer by ensuring compatibility between digital data and the analog systems used for transmission.