Cutting It Short

When getting a haircut to make side swept bangs (boys) what exactly they are doing?

Besides cutting to make it brief what exactly is needed for this style? Does the stylist, simply rinse the hair in certain places if needed, what about layers. This is one of layered hair styles?

I'm not a boy, but always looked like a sort of razor cut for me. (No, I mean as a razor. Is to use a razor instead of scissors to get a more tense and unequal)

Banged: Get Side Swept Bangs