[单选题]OSI七层模型中,“包”是哪一层数据封装的名称()
正确答案 :C
网络层
[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:
[单选题]路由器上,命令“show int s0”的显示结果为:Serial0 is up,line protocol is down出现该结果的可能原因是()
正确答案 :C
两端设备协议不一致
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