What term describes the range of frequencies available for signaling, expressed in hertz (Hz)?

The term that describes the range of frequencies available for signaling, expressed in hertz (Hz), is bandwidth. Bandwidth refers to the difference between the highest and lowest frequencies in a given range, which allows for the transmission of data over a communication medium. It is a critical concept in networking and telecommunications as it determines the capacity of a connection, affecting the amount of data that can be transmitted in a specific timeframe. A higher bandwidth indicates a larger range of frequencies, enabling faster data transmission rates.

In contrast to bandwidth, the other terms listed have different meanings and applications. Decibel is a unit used to measure the intensity of sound or signal strength, not frequency range. Power typically refers to the rate at which energy is transferred or converted and is not specifically related to frequency. Current refers to the flow of electric charge in a circuit and, while it can be affected by frequency in certain contexts, does not describe a range of frequencies itself.