4 ms·
> (or more accurately, the speed of electricity, which is close to the speed of light, at about 300,000 kilometers per second) Surely, the dominant part of the
by e12e 8y ago
> (or more accurately, the speed of electricity, which is close to the speed of light, at about 300,000 kilometers per second)
Surely, the dominant part of the path city to city is via fiber, so laser light?
That doesn't mean that's were most of the time goes (but ideally it should) - for latency things like light-to-signal, buffers, switching, carrier grade nat, all takes its toll.
Would be interesting to see a detailed breakdown of typical data center(... Cell phone, home broadband user) to same, though. Including every "point" in the path from ram, via cache, pci, network card, routers and switches, media converters and up again... For bonus something like USB keyboard touch to glyph on screen over udp or other low latency protocol...
- Hikikomori 8y agoYes, it's more or less all fiber. And in that case the speed is 2/3 of the speed of light. Delay will in most part be because of distance, forwarding delay in routers are a few 10's of microseconds while switches are at the sub-microsecond level. Stuff like this is quick when they have to handle 100Gbit interfaces.
- e12e 8y ago(I assume you mean 2/3 of light speed in vacuum - it's 100% the speed of light in acrylic (?))