What is the difference between acute renal failure and end-stage renal failure?

Renal failure: Acute renal failure: seen in a healthy person who develops an illness (e.g. hemolytic uremic syndrome [in children] or septic shock and multiple organ dysfunction) that leads to renal failure. Often it resolves. End-stage renal disease implies that the problem has been there for weeks/months, is not going to resolve and the person may need kidney transplant