Measuring one-way network latency, jitter and packet loss on Linux
Ping can tell you round-trip or two-way latency, but if you want to know if it's upstream of downstream that's slowing down you need something else. You need OWAMP (One-Way Ping).
Parasta A-ryhmää, ei järjellä, ei taidolla, ei työllä, ei tuskalla vaan tuurilla!