The Window Scaling Graph of the TCP stream graph enables us to look at the window size published by the receiving side, which is an indication of the receiver's ability to process data. Along with the other graphs, it provides us with a look at the performance of the connection.
Open an existing capture or start a new capture. Click on a specific packet in the capture file. Even though you can use this feature on a running capture, it is not meant for online statistics, so it is recommended that you start a capture, stop it, and then use this tool.
To view TCP stream graph statistics, perform the following steps:
In this graph, we see the instability caused by one of the sides. This can be an indication of a slow server or client that cannot process all the data it receives and therefore, by reducing the received window size, it tells the other side to send less data.
The software here simply watches the window size on the connection and draws it. In Chapter 9, UDP/TCP Analysis, we will get into the details.
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