计算机网络 - 自上而下的方法
问题描述：
为什么说FTP发送控制信息'带外'？
Why is it said that FTP sends control information 'out-of-band'?
答
谷歌是你的朋友：好好经常拜访他。他可以比在这里发布问题更快地回答问题...
使用您的问题进行快速搜索，因为搜索字词会给您带来一些结果阅读......
将来，请尝试自己做至少基础研究，不要浪费你的时间或我们的时间。
Google is your friend: Be nice and visit him often. He can answer questions a lot more quickly than posting them here...
A very quick search using your question as the search term will give you the result with a little bit of reading...
In future, please try to do at least basic research yourself, and not waste your time or ours.
>