在OSI七层协议中，HTTP是（）协议。
- A.网络层
- B.传输层
- C.会话层
- D.应用层
正确答案及解析
正确答案
解析
OSI采用了分层的结构化技术，从下到上共分七层：物理层、数据链路层、网络层、传输层、会话层、表示层、应用层，具体如下图所示。
其中，应用层负责对软件提供接口以使程序能使用网络服务。在TCP／IP协议栈中，各层常见的协议如下图所示。
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- A.low-level
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- A.path
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