Melania calls her target's help desk claiming to be the senior assistant to an officer of the company. She requests that the help desk reset the officer's password because of an issue with his laptop while traveling and persuades them to do so. What type of attack has she successfully completed?

Melania's interaction with the help desk is a social engineering attack because she manipulated the staff into performing an action (password reset) by impersonating an internal employee. Zero knowledge and black box describe testing methodologies, and 'help-desk spoofing' is not an industry term.