
Now I know this is not the best measure and is quite possibly higher but: is 0ms technically possible under ideal conditions, or can it never be 0? Can it even be 0 if we allow for rounding to the nearest ms?
![]() ![]() |
rm *
Paulthagerous: Did a speedtest and, aside from speeds being less than 1/20th what they usually are, noticed ping was 0ms:
Now I know this is not the best measure and is quite possibly higher but: is 0ms technically possible under ideal conditions, or can it never be 0? Can it even be 0 if we allow for rounding to the nearest ms?
michaeln: No, it's not strinctly possible, but rounded to the nearest ms it's very possible.
I.e., for up to 10km and on a 10Mbps Ethernet, you'd expect a minimum of 0.19ms round trip for 64byte packets. Actual latency could be higher, for various reasons, but given that processing speed on modern routers is microseconds per packet, you are not going to get above the .5ms needed to round to 1ms.
Note that ADSL imposes several ms of latency due to forward error correction, and cable somewhat less, so you should never see zero ms on current consumer broadband. You on the other hand appear to be fibre connected.
vinnieg:
Nah not possible at the Uni here,
while we do have a 1gb link between campuses and to citylink
The new proxy that was implemented is caching it I think, as well as sharing the load, because when students come back, it gets owned!!!, using the mac Manual staff proxy I get(I'm using a PC):
rm *
maknz: I doubt it's exactly 0 (null), it may be <=0.49ms though.
is 0ms technically possible under ideal conditions, or can it never be 0? Can it even be 0 if we allow for rounding to the nearest ms?
rvangelder:maknz: I doubt it's exactly 0 (null), it may be <=0.49ms though.
a real geek might have said <0.5ms, in case their ping was 0.491ms
Screeb:is 0ms technically possible under ideal conditions, or can it never be 0? Can it even be 0 if we allow for rounding to the nearest ms?
Just to spell it out, latency is the time taken for an internet signal to get from one computer to another. This is ALWAYS greater than 0 - after all, no information can move faster than the speed of light. 0ms is either rounding (very nearby server (unlikely) or cache) or a bug.
vinnieg: Yeah it is, we started implementing Bluecoat early in Jan(Dec for the trials), seems to be working ok...
rm *
![]() ![]() |