Unlock the Mystery of Duplicate Acknowledgments in TCP
If you've ever stared at a Wireshark capture wondering why you're seeing a flood of duplicate acknowledgments, this video by networking expert Chris Greer is exactly what you need. In this focused, no-fluff tutorial, Chris breaks down one of the most commonly misunderstood behaviors in TCP/IP traffic analysis — duplicate ACKs — and explains not just what they are, but why they appear and what they're telling you about your network.
Perfect for Troubleshooters at Every Level
Whether you're a seasoned network engineer or just getting started with packet analysis, Chris has a knack for making complex TCP mechanics approachable and digestible. He walks you through real trace files in Wireshark, showing you how to identify duplicate acknowledgments, read them correctly, and understand the conditions under which you might see hundreds of them pile up in a single capture. It's hands-on learning at its best.
Learn by Doing with a Real PCAP File
One of the standout features of this tutorial is that Chris provides a downloadable PCAP file via CloudShark, so you can follow along in your own Wireshark environment as you watch. There's no better way to build confidence with packet analysis than working through a real capture side by side with an expert guide — and this video gives you exactly that opportunity.
Part of a World-Class Wireshark Learning Library
This video is just one gem in Chris Greer's extensive catalog of Wireshark and TCP/IP training content. As the founder of Packet Pioneer and a trainer with thousands of students worldwide, Chris brings both deep technical knowledge and genuine teaching ability to every video. If this tutorial sparks your interest, he also offers full courses on Wireshark and Nmap, as well as live virtual TCP/IP deep-dive sessions for those who want to go even further. Subscribe to his channel and level up your network analysis skills today.
