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我想知道如何通过 TCP 实现即发即弃模式。我认为这三个步骤是连接、发送消息和断开连接,但让我思考它的真正实现方式是与三次握手相关的开销。由于这种开销,也许它是通过持久连接实现的?我不这么认为,但我需要对此进行一些澄清。