(Why is there such a book? In the past few years of working, prion friends and some netizens often ask me some questions about traffic analysis, such as:? Why is our LAN so slow? Is someone under BT?? 192.168.0.1 is not used. Why does the network card flash wildly? What is it doing?? The boss asked me to find out why the friend server always has such a large flow, but I don't know where to start.? The company's export bandwidth is insufficient, but there is not so much bandwidth budget at the moment. I am considering whether to close some agreements unrelated to the company's business, but I do not know which agreements should be closed. There are still many such problems. Of course, it is not a difficult problem for the network personnel who work with other companies, but it is also an impossible task for the network management personnel in general non IT companies. Therefore, this book is available. In other words, the purpose of this book is to help ordinary network management personnel understand the operation of the network they manage, and troubleshoot the problems of slow network speed and large bandwidth occupation by individual hosts.)
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