One characteristic of a good resume is the inclusion of a letter of intent. For your resume at hand, it is also important that you specify the department where you want to apply for a job post. An administrative cover letter is an essential part of your document if you wish to be hired.
Usually, administrative cover letters encompass a large domain of hiring prospects. This is because in any companies, the administrative divisions can provide a lot of openings that range from the lowest to the highest positions. Therefore, if you are going to include a cover letter, be sure that you have already decided where you want to belong to.