下列说法错误的是 ( ) A . java.net 包中提供 了 TCP 和 UDP 两种 常见的网络协议的支持。 B.TCP 协议保障 了两个应用程序之间的可靠通信 C . UDP 是一 个无连接的协议。提供了应用程序之间要发送的数据包。 D. IP 协议 对应于网络中的传输层
A.
java.net 包中提供 了 TCP 和 UDP 两种 常见的网络协议的支持
B.
TCP 协议保障 了两个应用程序之间的可靠通信
C.
UDP 是一 个无连接协议。提供了应用程序之间要发送的数据包。
D.
IP 协议 对应于网络中的传输层
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