《Operating System Concepts》阅读笔记：p606-p625

《Operating System Concepts》学习第 55 天，p606-p625 总结，总计 20 页。

一、技术总结

1.remote file system

(1)ftp

允许匿名访问(anonymous access)或者认证访问(authenticated access)。

(2)Distributed File System(DFS)

(3)world wide web(www)

2.NFS

Network File System(NFS)——A common network file system used by UNIX, Linux, and other operating systems to share files across a network。

3.four-layered model of security

(1)physical

(2)network

(3)operating system

(4)application

二、英语总结(生词：1)

1.resiliency

(1)resilience: re-(“back”) + salire(“to jump, leap”)

u. resilience literally means to jump back. the ability to recover from difficulty(恢复力)，主要用在英式英语中。

(2)resiliency: resilience + -cy

意思和 resilience 一样，主要用在美式英语中。

(3)示例

Although some networks have built-in resiliency, including multiple paths between hosts, many do not. Any single failure can thus interrupt the flow of DFS commands.(《Operating System Concepts》第 608 页)。

关于英语的注解同步更新汇总到 https://github.com/codists/English-In-CS-Books 仓库。

三、其它

今天没有什么想说的。

四、参考资料

1. 编程

(1) Abraham Silberschatz，Peter Baer Galvin，Greg Gagne《Operating System Concepts》：https://book.douban.com/subject/30272539/

2. 英语

(1) Etymology Dictionary：https://www.etymonline.com

(2) Cambridge Dictionary：https://dictionary.cambridge.org

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