sniffer

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Some sniffers are "third-party," and sniff traffic between machines external to the sniffer itself.
有些嗅探器是 “第三方”，嗅探外部機器與嗅探器本身之間的流量。
For example, a network sniffer could track which machines and at what time a particular machine communicated with another machine just by knowing its MAC address.
例如，只要知道一臺機器的 MAC 地址，網(wǎng)絡(luò)嗅探器就可以追蹤哪些機器以及在什么時候哪臺機器與此機器通信。
If you stick a packet sniffer on the network, you will notice that each traffic manager has started to announce its health using IGMP/Multicast heartbeat messages.
如果您在網(wǎng)絡(luò)上使用數(shù)據(jù)包嗅探器，那么您會注意到，各流量管理器均已開始使用 IGMP/多播心跳消息來公布其健康狀況。

Now,officials at the Glasgow airport in Scotland are testing a new security device called an "electronic sniffer dog."
Rescuers with bulldozers and sniffer dogs continued their search for survivors Saturday.

a device for detecting hidden substances such as drugs or explosives, esp by their odour