> must-revalidate, max-age=0 if server doesn't respond it may give you cached > no-cache won't give you cached entry without validation > must-revalidate, max

> must-revalidate, max-age=0 if server doesn't respond it may give you cached > no-cache won't give you cached entry without validation > must-revalidate, max-age=10 will revalidate only after the time has expired