Knowing what information is traveling across your network is what keeps you out of trouble. Are there unknown hosts chatting away with each other? Is my machine talking to strangers? You need a packet sniffer to really find the answers to these questions. Wireshark is one of the best tools to do this job and this book is one of the best ways to learn about that tool. Chris Sanders, the author of this handy book, brings you the information cleanly and clearly. His style is to show you—to walk you through exactly what to do. This method works well and the book is quite readable.