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. 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.

Wireshark is the world's most popular network analyzer tool with over 500,000 downloads per month. This book provides insider tips and tricks to spot performance issues fast - no more finger pointing because the packets never lie From "Death by Database" to "Troubleshooting Time Syncing," 49 case studies offer insight into performance and security situations solved with Wireshark. Learn to customize Wireshark for faster and more accurate analysis of your network traffic. Build graphs to identify and expose issues such as packet loss, receiver congestion, slow server response, network queuing and more. This book is the Official Study Guide for the Wireshark Certified Network Analyst program. This Second Edition includes an introduction to IPv6, ICMPv6 and DHCPv6 analysis, updated Wireshark functionality and new trace files. Refer to www.wiresharkbook.com for book supplements, index, table of contents and more.