In the process of sending bits over guided (like cables) and unguided (like air or space) media, the bits need to be converted into analog signals. This conversion is achieved through a technique known as modulation 🎛️. There are various types of modulation techniques, including amplitude modulation 📶, frequency modulation 📡, and phase modulation 📈. However, when the goal is to send digital data as an analog signal, digital modulation 🌐 is the technique used. Digital modulation ensures that the digital data is accurately transmitted over both guided and unguided media, maintaining the integrity of the information being sent.