Generally, a resume is much shorter in length compared to a CV, usually limited to one page. It is meant to be a very brief synopsis of your career and education history. Resumes should focus on measurable accomplishments rather than soft skills or listed responsibilities. Like a CV, resumes need to be updated, but those updates should be made form specific job to which you are applying.
In addition, functional or combination resumes may also be useful if you are trying to draw the readers attention away from something – namely, large gaps in your work history or detours into unrelated fields.