下列不属于数据可用性技术的是（）。
- A.数据签名
- B.磁盘和系统的容错
- C.可接受的登陆及进程性能
- D.可靠的功能性的安全进程和机制
正确答案及解析
正确答案
解析
数据可用性技术包括：①磁盘和系统的容错；②可接受的登陆及进程性能；③可靠的功能性的安全进程和机制；④数据冗余及备份。
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