问题:
A . improving the network management system and the performance and functionality of infrastructure operations
B . providing a step-by-step plan that details the installation and service-commission tasks required in order to create a controlled-implementation environment that emulates a customer network
C . developing and implementing a training plan using classes, workshops, or c-learning courses
D . compiling a training manual for use in ongoing operations
E . reducing the risk of downtime due to facilities-related problem
● 参考解析
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