回複：你如果用英文問，可能比較好，說實話，中文問題都看不懂

Sure. Basically we know that Oracle does their client/server communication on top of TCP/IP. Oracle must have their own protocol to guide the handshake between client and server, and data exchange after the initial handshake. That's what I'm asking for. I can imagine that client open a socket with server, send username/password, then start sending user requests ...
Thanks.