(Wireshark is a network packet analysis tool. The main function of the network packet analysis tool is to try to capture network packets and try to display the details of the packets as much as possible. You can think of the network packet analysis tool as a measurement tool used to measure what goes in and out of the network cable, just like the watt hour meter used by electricians to measure the amount of electricity entering the telecommunications. In the past, such tools were either too expensive, owned by someone, or both. After the emergence of Wireshark, this situation has changed. Wireshark is probably the best Kaiyuan network analysis software available today.
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Wireshark tutorial doc....)