下列关于Internet中一个重要的传输层协议TCP的描述中错误的是()
A.
提供面向连接的传输服务
B.
提供可靠的传输服务
C.
提供单工通信服务
D.
TCP为每块客户数据配上一个TCP首部,从而形成多个TCP报文段
正确答案是C
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