更改和更新安全架构的难度如何？
How easily can the security architecture be changed and upgraded?
如果在强制模式下运行 SELinux，还应当运行 /usr/lib/cups/filter 目录中的 restorecon 来更新安全上下文。
If you are running SELinux in enforcing mode, you should also run restorecon in the /usr/lib/cups/filter directory to update the security contexts.
其一，推进全互联网范围内标准的更新换代，引导新安全补充协议得以接受从而抛弃旧的版本。
On the one hand, the evolution of internet-wide standards led to new security fixes being proposed and obsoleting older versions.
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