In the midst of trying to diagnose a slow vpn issue, I'm getting a bit confused by the various metrics being mentioned by the many different techs I've been speaking with.
From what I understand, bandwidth is the size of the pipe (the number of lanes on the freeway), latency is response speed (how fast cars can travel on the freeway). But then we start getting into issues of Upload speed vs Download speed (40Mbps upload/15Mbps down) and things start to break down for me.
ping measure latency (more or less considering it's ICMP that can be dealt with in different ways by different routers), and
iperf measures bandwidth. Tools like Ookla Speedtest report download and upload speed. If
ping reports 20ms and
iperf reports 20Mbps bandwidth, how do these relate to upload and download speeds reported by Speedtest as 80Mbps down and 15 Mbps upload?
Also, if I wanted to verify or confirm speeds as indicated by the Ookla speed test with different tools (
iperf or 'nc` or other), how would do this to get similar speeds for upload and download. This could also be for any other tool that reports download/upload speed, not just Ookla.
Thanks for any insights.