234.Which type of backup contains only the blocks that have changed since the last level 0 incremental
backup?
A. a cumulative level 1 backup
B. a differential level 1 backup
C. a full backup
D. a whole backup
Answer: A
答案解析：
如图：
增量累积备份参考：http://blog.csdn.net/rlhua/article/details/11763671