Final answer:
In baseband signaling, each bit of data is represented by a pulse of electricity on digital media or light on fiber-optic media.
Step-by-step explanation:
In baseband signaling, each bit of data is represented by a pulse of electricity on digital media or light on fiber-optic media. In digital signaling, the data is represented by binary ones and zeros, where each one or zero constitutes one bit of data. On the other hand, in fiber-optic media, light signals are used to carry the data.