4 ms·
What people typically mean when they say speed of light is the speed in vacuum. For optical fibers, you can reduce that number by about 30%. It's also unlikely
by pfg 9y ago
What people typically mean when they say speed of light is the speed in vacuum. For optical fibers, you can reduce that number by about 30%. It's also unlikely that there is a straight line from A to B, and each network hop will introduce additional latency - there are > 10 hops from my home connection to Scaleway, and that's with both ends located in Europe.
- Ecco 9y agoGood points. The 30% increase and the not-straight-distance could explain a 50% slowdown. But here we have a 500% difference. Also the number of hops probably isn't really relevant : there probably isn't any router in the middle of the Atlantic, and just like you said there is already a bunch of router on an European-only route whose latency would most likely be below 10ms.
- pfg 9y agoIt's not really a question of where the hops are located. There'll be a couple of them in Europe and a couple in NA. Each will introduce a bit of latency. The numbers from the article are also round-trip times (that's what you get with the ping command), so you'd have to double whatever number you come up with from the one-way distance alone.
- effie 9y ago> The numbers from the article are also round-trip times (that's what you get with the ping command), so you'd have to double whatever number you come up with from the one-way distance alone. Indeed, the theoretical minimum ping time for 9000km is 60ms.