A customer would like to create a 1：1 protection group with a DS3Ni-12 card. Where should it be placed in the chassis？（）
- A、 only Slots 6 or 12
- B、 only Slots 3 or 15
- C、 high or low speed slots
- D、 directly adjacent to the working card
- E、 high-speed slots only （5/6 and 12/13）
正确答案:D
答案解析:有
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