642-813 141 题

Mrserious

如题：
QUESTION 141
Which two items are most important for managing the long-term success of high availability? (Choose two)
A. Completing aggressive implementation schedule
B. Stateful Switchover
C. Company and user expectations
D. Nonstop Forwarding
E. Change control processes
F. Dual devices and dual links

答案是是 CE ，自己只选择了 C ，对于E的意思不明白，请各位给帮解答下，谢谢！

cgd101

Change control processes 指的是change management吧，就是怎么管理对于网络系统的变更。比如配置的修改，设备升级，线路割接都属于change。任何不慎重的change都会有可能损害网络的availability，所以要有完善的变更控制体系来确保change造成的影响最小化。