问题
单项选择题
按照国际标准化组织制定的开放系统互连参考模型，实现端用户之间可靠通信的协议层是__( )__ 。
A．应用层
B．会话层
C．传输层
D．网络层
答案
参考答案：C
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按照国际标准化组织制定的开放系统互连参考模型，实现端用户之间可靠通信的协议层是__( )__ 。
A．应用层
B．会话层
C．传输层
D．网络层
参考答案：C
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