The presentation layer is concerned with

资格题库2022-08-02  38

问题 The presentation layer is concerned with the (  ) and semantics of the information exchanged between two systems.The processes in two systems are usually exchanging information in the form of character (  ) numbers, and so on.The information should be changed to bit(  )before being transmitted.Because different computers use different encoding systems, the presentation layer is responsible for(  )between these different encoding methods.The presentation layer at the sender changes the information from its sender-dependent format into a common format. The presentation layer at the receiving machine changes the common format into its(  )dependent format.A.systemsB.charactersC.layersD.streams

选项 A.systems
B.characters
C.layers
D.streams

答案 D

解析 表示层关注的是系统间语法和语义的信息交换。两系统间交换信息的形式主要有字符串形式等。信息都是被转换成比特流进行传递的。由于不同的计算机采用了不同的编码系统,需要表示层来负责这些不同编码方法间能互相操作。在发送端,表示层将信息从其本身的发送格式转换为一种通用格式。而在接收端,又将这种通用格式的数据转换为接收端本身使用的数据格式。
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