You are working as a senior technician at Domain.com. A trainee wants to know which types of printers that have a drum. What will your answer be?

A.
impact

B.
laser

C.
ink jet

D.
thermal

Explanation:
The laser is aimed at a rotating polygonal mirror, which directs the laser beam through a system of lenses and mirrors onto the photoreceptor. The beam sweeps across the photoreceptor at an angle to make the sweep straight across the page; the cylinder continues to rotate during the sweep and the angle of sweep compensates for this motion. The stream of rasterized data held in memory turns the laser on and off to form the dots on the cylinder.