This is one of the basic graphs that are created using the packets available in the capture file. To create the IO graph, select any TCP packet in your capture file and then click on IO Graph under Statistics. Refer to the following screenshot:

Figure 3.10: IO graphs

This way, you can see the highs and lows in your traffic, which can be used to rectify problems or can even be used for monitoring purpose. In the preceding graph, the data on the x axis represents the time in seconds and the data on y axis represents the number of packets per tick. The scale for the x and y axis can be altered if needed, where x axis will have a range between 10 and 0.001 seconds and y axis values will range between packets/bytes/bits.

From the preceding graph, we can easily depict that between sixtieth to eightieth second of the capture process, the network was most active, which generated approximately 1000 packets each second of the capture process. Now, you will be realizing how easy it was to gather...