OSI模型中，将比特流或字符流转换成帧格式功能属于______。
- A.物理层
- B.数据链路层
- C.网络层
- D.传输层
正确答案及解析
正确答案
解析
本题考查OSI7层模型基本知识。①物理层：将数据转换为可通过物理介质传送电子信号。②数据链路层：决定访问网络介质方式，在此层将数据分帧，并处理流控制。③网络层：数据传输路径选择。④传输层：提供终端到终端可靠连接。⑤会话层：建立连接。⑥表示层：协商数据交换格式。⑦应用层：用户应用程序和网络之间接口。
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