(Sniffer, which can be translated as sniffer in Chinese, is a network analysis method based on the principle of forced listening. Using this technical method, it is possible to monitor the status of the network, the flow of data, and the information transmitted on the network. SnifferSniffer is divided into software and hardware. The software Sniffer includes SnifferPro, NetworkMonitor, PacketBone, etc. Its advantages are easy to install and deploy, easy to learn and use, and easy to exchange at the same time; Therefore, it is impossible to truly understand the faults and operating conditions of the network. The hardware Sniffer is generally called a protocol analyzer, which is generally commercial, and the price is relatively expensive, but it will have the function of supporting various extended link capture capabilities and high-performance real-time data capture and analysis. Sniffer based on Ethernet network sniffing can only capture packets within a physical network segment, that is to say, there can be no routing or other devices that block broadcast packets between you and the monitoring solution. This is very important. Therefore, for ordinary dial-up Internet users, it is impossible to use Sniffer to eavesdrop on other people's communications.)
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