In simple terms, communication relay refers to the process of receiving, amplifying, or altering a signal or data and forwarding it to the next point in the communication chain. This process ensures that information can travel long distances or through obstacles that would otherwise prevent clear transmission. Communication relay devices, such as repeaters, relay satellites, and wireless relays, are strategically placed within networks to enhance the range, reliability, and strength of signals.

    The core function of a communication relay is to extend the coverage area. Without relays, signals would weaken or dissipate over long distances or when obstructed by physical barriers. Relays serve as intermediaries that enable data to traverse these limitations, making it possible for people and devices to remain connected across vast expanses.