(IDC export traffic sorting, TCP abnormal connection analysis cases, flyer worm research, ARP chapter of introduction to black K attack and defense technology, loop analysis, backtracking discovery, mining, tracking Trojan horse communication, backtracking abnormal traffic analysis, recording the analysis process of two network outages, spam behavior analysis, evaluation of a unit's financial system and OA system, fault handling report of a radio station, abnormal behavior monitoring of a telecom IDC room -- managed server, An Internet fault analysis report, a newspaper industry analysis report in a province, a natural gas analysis report in a province, a boss system fault analysis of a mobile company, a communication problem between a bank branch and the head office, a user network problem analysis report, a backtracking analysis case of a securities company, a tax system problem analysis, a network fault analysis report, an analysis case of port scanning behavior, an email system attack analysis, a packet capture verification iosbug case.)