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【单选题】
关于 TCP 和 UDP 协议区别的描述,错误的是( )。
A.
TCP 协议可靠性高, UDP 则需要应用层保证数据传输的可靠性
B.
UDP 协议要求对方发出的每个数据包都要确认
C.
TCP 协议是面向连接的,而 UDP 是无连接的
D.
UDP 协议比 TCP 协议的可靠性差
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