How are digital signals sent and received?

Digital signals are transmitted as discrete values, typically represented by binary code (0s and 1s). These signals can be sent over various media, including copper wires, fiber optics, and wireless channels, using modulation techniques to encode the data. On the receiving end, the digital signal is demodulated and processed to reconstruct the original information. This process allows for efficient and reliable communication in various applications, including telecommunications and computer networks.