大多数的网络嗅探器也能够解码和解密特定的数据包内容，这能够帮助您研究一个已知协议的内容。

Most of the network sniffers will also decode and decipher specific packet contents, which will help you when you want to study the content of a recognized protocol.

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另外，随着现代网络环境中交换机的大量使用，传统的网络嗅探器不能再监听到在其它主机之间来回传递的数据包。

Besides, with the rapid use of switches in modern network circumstances, the previously used network sniffer programs can not detect the data traffic between other hosts.

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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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