(Indeed, it is not just as simple as capturing packets. After a brief introduction to the functions of Wireshark, the course content quickly entered the core course content of Wireshark network analysis practice. The content of the course includes the construction of the experimental environment used in the course, the security of the network link layer, the security of the network layer, the security of the transport layer, and the comprehensive analysis of the security of the application layer, which makes the function of Wireshark to a higher level.)