[G4] Broadband Speed Liar's Poker

[sr ferenczy]

=) 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 :
_______________________________________________________
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






On Dec 29, 2003, at 12:32 AM, James Asherman wrote:

>
> In the utilities folder in Apps in osX is an "internet utility.
> Only fair test . ping Yahoo.com...    Itt pings it ten times and gives 
> an average .
>
>  Mine is 18.5 milliseconds. I am told that this is good and I am 
> doubtful of any but the most expensive DSL  even nearing it.
>
> EGAD! I am contentious.
> J