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Monitor all and any internet traffic from my home PC - what should I use?

Recently, I discovered that something is downloading on my computer even if I doesn't do anything with it.

Is there any program that can check what process or application that is using the network?

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marked as duplicate by Mehper C. Palavuzlar, Nifle, Diago Nov 20 '10 at 15:17

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3 Answers 3

There are many network monitors, I use TCPView, you can see how many connections each program has opened and how many bytes are transferred.

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Use a packet sniffer like Wireshark.

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+1 Wireshark is great for this. –  Kyle Nov 20 '10 at 14:27

I found one called Net Limiter witch was very simple and powerful. Thanks for your help anyway. :)

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