What are the structures and functions of the front and rear axles?

What is the axle structure of heavy truck and the role of each axle in the whole vehicle
To put it simply: for conventional vehicles, the front axle is turned to the front axle according to the non drive mode, and the rear axle is turned to the single axle according to the two-stage reduction mode
Front axle structure: hub assembly, brake drum, brake assembly, steering knuckle assembly, front axle (I-beam), kingpin, thrust bearing, tie rod assembly, left and right tie rod arms, straight tie rod arms
Front axle function: bearing, braking, steering
Rear axle structure: hub assembly, brake drum, axle housing assembly, main reducer assembly, wheel reducer assembly, axle shaft, brake assembly
Rear axle function: load bearing, transmission, braking, differential