To transmit a 1000-byte ethernet frame... (Best answer 10 points!)

Question

How long does it take, in milliseconds, to transmit a 1000-byte ethernet frame onto a 100 Mbps ethernet network? This is assuming no collisions and no waiting.

Please explain how to find out the answer.

Answer 1

For a real result  You can just run a PING and get the actual MEASURED time

ping -l 1000  x*x.x*x.x*x.x*x

The L 1000 says to send a 1000byte block.. the times will show the time needed.  x*x.x*x.x*x.x*x is the IP you want to test!

Just divide the result by 2 (one up one down) to see the one way time.

For theoretical time you can do the math.

use http://www.onlineconversion.com/

1000 Bytes = 8000 bits since you need bits for Mbs (bits)

1 bit takes 1 second / 100.000.000 bits = 0.00000001 seconds

so

8000 * .00000001=0.00008 seconds for 8000 bits

there are 1000 milliseconds / second

so .000008*1000 = .08 milliseconds  

(Check my math,, I don't have a calculator handy)