True, Sniffers enable hackers to steal proprietary information from anywhere on a network, including e-mail messages, company files, and confidential reports,
A sniffer is a piece of hardware or software that enables the user to "sniff" or watch your internet traffic in real time, recording all the information going to and from your computer.
Not all sniffers are bad news. Sniffing tools are frequently used by administrators to keep traffic moving steadily through their networks. They can identify those who are using file-sharing apps heavily as bandwidth hogs and take the necessary countermeasures. The trademarked name of one such surveillance program, now owned by NetScout, is "Sniffer" with a capital S.
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