j*****I
发帖数: 2626 | 1 是protection & security part的导言。我个人感觉是两段车轱辘话，翻来覆去的说同
一件事，
但是两段前后又不太一致。因为是大师写的，又是第6版，我相信是自己哪没看明白。
请各位帮忙指点下
子。
Protection mechanisms provide controlled access by limiting the types of
file access permitted to users. In addition, protection must also ensure
that only those processes that have gained proper authorization from the
operating system can operate on memory segments, the CPU, and other
resources.
Protection is provided by a mechanism that controls the access of
programs, processes, or users to the resources defined by a computer
system. This mechanism must provide a means for specification of the
controls to be imposed, together with a means of enforcement.
两段看下来，我的大致印象就是都在描述protection是干嘛的。但是细看疙疙瘩瘩的，
简直像是两个
人写的，不明白为什么要分两段说，还说的这么不一致。 |
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