You've configured an interface with an IP address and commited the change. You then commited a change that added an exception in a firewall filter to allow this network through the filter. You realize that this work was done on the wrong router. How do you undo all these changes?（）
- A、rollback 2
- B、rollback 1
- C、rollback 0
- D、rollback 3
正确答案:A
答案解析:有
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