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- 搜题干
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单项选择题
在ISＯ定义的七层参考模型中，对数据链路层的描述正确的是：（）
A.实现数据传输所需要的机械，接口，电气等属性。
B.实施流量监控，错误检测，链路管理，物理寻址。
C.检查网络拓扑结构，进行路由选择和报文转发。
D.提供应用软件的接口
E.提供端到端数据传输的链路建立机制。
B.实施流量监控，错误检测，链路管理，物理寻址。
C.检查网络拓扑结构，进行路由选择和报文转发。
D.提供应用软件的接口
E.提供端到端数据传输的链路建立机制。
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问答题
__________ was a Lingua Franca in the Middle Ages and __________ became a Lingua Franca in
the 18 th century. Today __________ is considered a Lingua Franca because it has become the most widely used language spoken by non-native speakers. It is often called a __________ language that sustains communication in this global village---the world.
答案：
Latin was a Lingua Franca in the Middle Ages and French beca...
