What advantage is realized by increasing the voltage in a broadband cable network from 60 volts alternating current (VAC) to 90 volts?

Increasing the voltage in a broadband cable network from 60 volts to 90 volts primarily reduces the voltage drop, which enhances power efficiency. Voltage drop occurs when the voltage level decreases along the length of a conductor due to the resistance of the materials involved. By operating at a higher voltage, the same amount of power can be transmitted with a smaller current. According to Ohm's Law, when voltage increases while maintaining the same power levels, the current drawn decreases. This means less energy is lost as heat within the conductors, resulting in more efficient power utilization.

In practical terms, lower current reduces the resistive losses in the cables, which can lead to improved performance and reliability of the broadband network. Additionally, a smaller current can allow for lighter and less expensive wiring to be used, potentially reducing installation costs and making the infrastructure less bulky.

The other options may address network performance or equipment concerns, but they do not directly relate to the immediate benefits of increasing voltage in this context, making this choice the most relevant.