A resistor network is a combination of multiple resistors connected together in various configurations, such as series or parallel. These networks are used to control the flow of electric current in a circuit, allowing for specific voltage and current levels to be achieved. By adjusting the values and arrangement of the resistors, engineers can design circuits that meet particular requirements. In a series connection, the total resistance increases as resistors are added, while in a parallel connection, the total resistance decreases. Understanding resistor networks is essential for designing electronic devices and systems, as they play a crucial role in managing electrical signals and power distribution.