I just witnessed something that blew my mind. I was downloading something on BitTorrent, and it was downloading at a fairly high rate (~1MB/s). The upload speed was very low (~15kB/s courtesy of lots of seeders).
What surprised me though as that while BitTorrent was running (and downloading), I couldn't access any webpage, or ping any website. What was even more weird was that Windows was showing me the "I'm connected to the wireless router but there is no internet connection" symbol.
Microsoft diagnostics said it couldn't find the DNS server (which explains why I couldn't access/ping webpages). When I looked at the networking tab, of course it showed me plenty of activity courtesy of BitTorrent.
Everything went back to normal as soon as the download finished.
I suppose my question here is: is it possible for BitTorrent to completely hog my bandwidth, leading Windows to believe that my computer is not connected to the internet? How does Windows actually determine if my computer is connected to the internet?