Hi,First of all, google.com is an HTTPS site so COIN isn't caching HTTPS content, so you'll never see it into the cache.
To test if your cache is working, try to download a file via HTTP transfer from one pc then try with another one to download the same file, and you will see that there is no internet traffic.
This kind of test was done on COIN by our side before release it.
Have a nice day.
Nice ,in one words everything will be happend in http sites only right?
Thank you