A chronological resume typically lists each job you have held in order, beginning with the most recent. It works well if you have several years of relevant experience.
A functional resume focuses on your experience and skills, instead of your chronological work history. It works well for people who are changing careers or who have gaps in their employment history.
A combination resume lists your experience and skills first, and your employment history next. It allows you to both highlight your relevant skills and to provide the chronological work history that some employers favor.