(This book specifically discusses the principles of traffic analysis technology and the working principles of the corresponding traffic analysis tools, focusing on how to conduct network traffic analysis in conjunction with network practice management operations. Contact case analysis to discuss how to quickly discover the traffic that affects the operation of the network, analyze the factors that cause these traffic, and solve the problem. Contact practical examples, so that readers can effectively grasp the analysis methods of various network practices that endanger the normal operation of the network, such as worms, arp attacks, dos attacks, routing problems, and software resource abuse. .The technical content of the book is mainly based on practical technology, which can greatly improve the network analysis technology level of network managers, and then sway freely in the practical network management operations that require higher and higher management levels. This book is suitable for the technical staff and related professional teachers and students who are engaged in network management operations. ...)