Is There A Free Software To Monitor Or Track The Links From My Computor To The Final Destinations?

Sometimes I see lot of traffic flow from and to my computor even when the web pages are already downloaded. I want to check which of the software is active and to which final destination the computor is communicating and thru which IP’s.
Is there a tracking tool available?

I Have A Wifi Network, Is There A Way Or A Software That I Can Install To Track The Traffic On The Computers?

a few people connect with their laptops, i was wondering if there can be something installed to track what websites they visit witout having to install anything on their laptops/computers etc.
tahnks
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What’s A Nice Software To Track Internet Traffic On My Pc?

software must indicate how much kbps (not bytes uploaded/downloaded) each site or application is consuming as well as the site it is accessing.
i tried comodo but it doesn’t give bandwidth per second consumption.