Ladder networks are comprised of a series of alternating series and parallel connections. Each section effectively loads the prior section, meaning that the voltage and current of the prior section may change considerably if the loading section is removed. One possible technique for the solution of ladder networks is a series of cascading voltage dividers. Current dividers may also be used. In contrast, bridge networks typically make use of four elements arranged in dual series and parallel configuration. These are often used in measurement systems with the voltage of interest derived from the difference of two series subcircuit voltages. As in the simpler series-parallel networks; KVL, KCL, the current divider rule and the voltage divider rule may be used in combination to analyze the sub-circuits.