多选题An automotive supplier maintains CAD workstations in widely separated plant locations， and these locations are interconnected by single 1.5Mb/second communication lines. A consultant has been asked to provide a solution that will allow back-ups to be
题目
多选题
An automotive supplier maintains CAD workstations in widely separated plant locations， and these locations are interconnected by single 1.5Mb/second communication lines. A consultant has been asked to provide a solution that will allow back-ups to be centralized in one location and improve data recovery times. Which TWO questions should the consultant ask first to determine the best solution？（）
A
In what format are the CAD documents？
B
How much data needs to be backed up from each remote site？
C
What are the current acceptable windows for back up and restore？
D
Are the plants within line-of-sight to enable wireless communication？
E
Can the communication lines cost-effectively be upgraded to a higher level of service？