Whether you are a Wireshark newbie or an experienced Wireshark user, this book streamlines troubleshooting techniques used by Laura Chappell in her 20+ years of network analysis experience. Laura Chappell, Protocol Analysis Institute, and Chappell University are not affiliated with the Wireshark Foundation. Learn insider tips and tricks to quickly detect the cause of poor network performance. This book consists of troubleshooting labs to walk you through the process of measuring client/server/network delays, detecting application error responses, catching delayed responses, locating the point of packet loss, spotting TCP receiver congestion, and more. Key topics include: path delays, client delays, server delays, connection refusals, service refusals, receive buffer overload, rate throttling, packet loss, redirections, queueing along a path, resolution failures, small MTU sizes, port number reuse, missing support for TCP SACK/Window Scaling, misbehaving infrastructure devices, weak signals (WLAN), and more. Book supplements include sample trace files, Laura's Wireshark troubleshooting profile, and a troubleshooting checklist.