TCP Dup ACKs: Problem? Normal? Something else?
One of the most common TCP analysis flags in Wireshark is TCP Dup ACK (Duplicate Acknowledgement). But what does it actually mean?
In this WCA tip, we examine duplicate ACKs, why they occur, and what they may indicate about network performance.
Download the pcap and follow along:
https://github.com/packetpioneer/youtube/blob/main/tcp-duplicate-acks-chrisgreer.pcapng
You'll learn:
• What a duplicate ACK is
• Why TCP sends duplicate acknowledgements
• How Wireshark identifies Dup ACKs
• When duplicate ACKs may indicate packet loss
This video supports the Wireshark Certified Analyst (WCA) exam objectives and helps build practical packet analysis skills.
? Learn more with the Wireshark Certified Analyst (WCA) course:
https://packetschool.teachable.com
WCA Objectives:
https://www.wireshark.org/pdf/wca-objectives.pdf
#Wireshark #TCP #NetworkAnalysis #PacketAnalysis #WCA #Networking
In this WCA tip, we examine duplicate ACKs, why they occur, and what they may indicate about network performance.
Download the pcap and follow along:
https://github.com/packetpioneer/youtube/blob/main/tcp-duplicate-acks-chrisgreer.pcapng
You'll learn:
• What a duplicate ACK is
• Why TCP sends duplicate acknowledgements
• How Wireshark identifies Dup ACKs
• When duplicate ACKs may indicate packet loss
This video supports the Wireshark Certified Analyst (WCA) exam objectives and helps build practical packet analysis skills.
? Learn more with the Wireshark Certified Analyst (WCA) course:
https://packetschool.teachable.com
WCA Objectives:
https://www.wireshark.org/pdf/wca-objectives.pdf
#Wireshark #TCP #NetworkAnalysis #PacketAnalysis #WCA #Networking
Chris Greer
Wireshark can be intimidating. Let's change that.
This channel is about analyzing protocols with Wireshark and other packet shredding tools. These skills are critical for network troubleshooting, Cybersecurity, and all IT roles.
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