Naturally, once a port is involved, security becomes an issue because you can't allow "just anybody" to connect up to the server and start issuing queries.
自然地，当涉及一个端口时，就得考虑安全性，因为您不能允许“所有人”连接服务器并进行查询。
Because the applet can connect only to its own server, you can't connect to the applet directly.
由于applet只能连接到自己的服务器，所以您就不能直接连接到applet。
Why can't I connect to a server?
为什么我不能连接到服务器？
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