What type of drive system uses a gear system that connects to either the front or rear axle based on the layout?

The drive system that utilizes a gear system to connect to either the front or rear axle is known as all-wheel drive (AWD). AWD is designed to provide power to both the front and rear axles, allowing for better traction and handling in various driving conditions. This system can automatically distribute power based on the vehicle's needs and road conditions, effectively responding to changes in traction by sending power to the wheels that have the most grip.

Front-wheel drive and rear-wheel drive, on the other hand, are specific configurations where power is delivered to either the front or the rear axle exclusively. While these systems have their advantages, they do not offer the same level of adaptability as all-wheel drive. By clearly understanding how these different drive systems function, one can better appreciate the versatility and performance advantages that an all-wheel drive system provides, particularly in challenging driving scenarios.