Part 1: Investigating Simple Selective Acknowledgements (SACKs)
In this video, the aim is to help improve our understanding of TCP/IP Selective Acknowledgements (SACKs) and how they are different to “Normal” TCP/IP Acknowledgements (ACKs).
How does Wireshark tell us about them and how should we interpret that information?
Wireshark SACKs view - Click on to enlarge image -
SACKs are much easier to understand if we have a diagram. I’ll be using charts from a packet analysis application called NetData to help me explain.
This is the first article of a proposed series that I have called:
Understanding Wireshark Outputs with NetData Charts