GPIB测量系统中的设备可以分为三类:(1)讲话者(Talker):发送数据信 息;(2)监听者(Listener):接收数据信息;(3)控制器(Controller):负责控 制总线上的信息流量,负责建立通信连接及向设备发送指令。
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到这时,彼得终于可以送一口气了,他成功地满足了所有监听者的需求,同时避免了与特定实现的紧耦合。
At this point, Peter breathes a sign of relief. He has managed to satisfy the requirements of all his listeners without having to be closely coupled with the specific implementations.
否则,恶意的监听者就可以在你的应用程序与最终用户之间的任何路由器上通过数据包探嗅到那些敏感的信息。
Otherwise, a malicious eavesdropper on any router between your server and the end user can very easily sniff the sensitive information out of the network packets.
用FTP上传包含数据库用户名和密码的PHP文件到远程WEB服务器时,恶意的监听者就会通过探嗅数据包来获得密码。
Transferring a PHP file that contains database passwords to your remote Webserver over an insecure protocol like FTP can allow an eavesdropper to sniff the packets and reveal your password.
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