2. 计算机
  3. The usual way to ensure reliable delivery is to provide the (71) with some feedback about what is happening at the other end of

The usual way to ensure reliable delivery is to provide the (71) with some feedback about what is happening at the other end of

admin2019-05-15  26
问题 The usual way to ensure reliable delivery is to provide the (71) with some feedback about what is happening at the other end of the line. Typically, the protocol calls for the receiver to send back special (72) flame bearing positive or negative (73) about the incoming frames. If the sender receives a positive acknowledgement about a frame, it knows the frame has arrived safely. On the other hand, a negative acknowledgement means that’ something has gone wrong, and the frame must be transmitted again.
   An additional complication comes from the possibility that hardware troubles may cause a flame to (74) completely. In this case, the receiver will not react at all, since it has no any reason to react. It should be clear that a protocol in which the sender transmits a frame and then waits for an acknowledgement, positive or negative, will hang forever if a frame is ever lost due to, for example, (75) hardware.
选项 A、vanish
B、vary
C、appear
D、incline
答案A
解析
转载请注明原文地址:https://kaotiyun.com/show/4GDZ777K
本试题收录于： 网络工程师上午基础知识考试题库软考中级分类
0

网络工程师上午基础知识考试

软考中级

相关试题推荐
随机试题
最新回复(0)