[单选题]下面哪个操作可以使访问控制列表真正生效（）。

正确答案 ：A

将访问控制列表应用到接口上

[单选题]On the topic of VLSM, which one of the following statements best describes the concept of the route aggregation?

正确答案 ：B

Combining routes to multiple networks into one supernet.

解析：解析：Explanation:

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