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1·Creates either a stream or a datagram socket.

创建数据流或数据报套接字。

2·This interface defines a factory for datagram socket implementations.

该接口定义了数据报套接字实现的工厂。

3·A message sent on a datagram socket was larger than the internal message buffer or some other network limit, or the buffer used to receive a datagram into was smaller than the datagram itself.

一个在数据报套接字上发送的消息大于内部消息缓冲器或其他一些网络限制，或该用户用于接收数据报的缓冲器比数据报小。