This is a zero byte message that tells the client that it's done with the "Hello" process and indicate that the server won't be asking the client for a certificate.

这是一个0字节的消息，它告诉客户端“hello”过程已经完成，也就意味着服务端将不验证客户端的证书。

youdao

And, finally, unlike streams a zero byte read does not indicate that the message has been fully received.

最后，不像流那样，读取了零字节并不表明已经完全接收了消息。

youdao