[G4] Broadband Speed Liar's Poker

[James Asherman]

On Monday, December 29, 2003, at 06:33  AM, sr ferenczy wrote:

> =) different "speed" measurements.
>
> Ping (named for the sound sonar makes) measures the "instantaneous" 
> connection speed between 2 nodes. it does not measure user network 
> traffic.
>
> basically, Ping is the response time, or latency-the initial time for 
> your computer to contact another node of the internet.
>
>
>
> i pulled this from this website 
> http://rescomp.stanford.edu/~cheshire/rants/Latency.html :

That's comforting.  wouldn't want to think  you wee trying to dazzle us 
with math.
> _______________________________________________________
> A typical Ethernet card has a latency less than 1ms. The Internet 
> backbone as a whole also has very good latency. Here's a real-world 
> example:
> 	• 	The distance from Stanford to Boston is 4320km.
> 	• 	The speed of light in vacuum is 300 x 10^6 m/s.
> 	• 	The speed of light in fibre is roughly 66% of the speed of light 
> in vacuum.
> 	• 	The speed of light in fibre is 300 x 10^6 m/s * 0.66 = 200 x 10^6 
> m/s.
> 	• 	The one-way delay to Boston is 4320 km / 200 x 10^6 m/s = 21.6ms.
> 	• 	The round-trip time to Boston and back is 43.2ms.
> 	• 	The current ping time from Stanford to Boston over today's 
> Internet is about 85ms:
> [cheshire at nitro]$ ping -c 1 lcs.mit.edu
> PING lcs.mit.edu (18.26.0.36): 56 data bytes
> 64 bytes from 18.26.0.36: icmp_seq=0 ttl=238 time=84.5 ms
> 	• 	So: the hardware of the Internet can currently achieve within a 
> factor of two of the speed of light.
> _______________________________________________________
>
>
> make any sense?
>
> sandor
>
>


's too early in my day to tell. But ..... let's just say that in making 
these tests, distance matters.
Also the threadname "liar's poker" fits. I'm cashin' in my chips.
  You guys can mug me on my way out.
  jim