What are the main types of drag acting on an aircraft?

The main types of drag are: Parasitic drag (form drag from shape, skin friction from surface roughness, and interference drag from component junctions), Induced drag (caused by wingtip vortices and lift generation), and Wave drag (in transonic and supersonic flight from shock waves). Total drag is the sum of all components, with parasitic drag dominating at high speeds and induced drag at low speeds.