What is modulation in communication networks?

Modulation in communication networks refers to the technique of varying a carrier signal's properties to encode data for transmission over various media. This involves changing aspects such as the amplitude, frequency, or phase of the signal, which allows data (such as voice, video, or internet traffic) to be superimposed onto the carrier wave.

By varying the voltage of an electrical signal—this is a simplified way of conceptualizing it—modulation enables the efficient transmission of information over distances and through different mediums. It helps in optimizing bandwidth usage, reducing interference, and improving signal quality, which are all critical for effective communication in networks.

When considering modulation in the context of communication systems, it plays a pivotal role in ensuring that data can be transmitted reliably and accurately from one point to another. The primary focus is on the manipulation of signal characteristics to facilitate effective communication, which directly aligns with the understanding of modulation as a process in electronic communication rather than aspects like data encryption, cable configuration, or transmission protocols.