The traces show the history of the probes for each device. MacPing probes each of the devices, and then advances the screen to the right. Thus, each dot represents a single test of one device.
A line of dots shows that the device has successfully responded to all the probes. Black marks in the trace indicate that the probes (or the responses) were dropped.
Every five seconds, MacPing draws a small vertical mark. This indicates that probing is in progress, and it allows you to estimate the rate of probing. The marks generally won’t be spaced evenly across the screen; they are closer together when:
• testing many devices
• testing with long packets
• many devices fail to respond (MacPing waits for each one)
