The odd thing is that even tho my internet (just on my PC, everyone else is working) stops working, i cant text or go to any website, i still can talk to my mates in TS, Mumble or Skype over voice chat.
Also i use a wired connection (but the same shit happens with WiFi) the icon in the task bar that shows network status is displayed as normal, no warnings what so ever.
I run windows 8.1 but as far as i can remember i had the same problem with windows 7 when i spammed to get into a server or refreshed a lot of times, the difference was that arma would would stop loading the servers list for me but if i want into my internet browser it would be working fine.
in the picture is the problem that i receive when scanning windows for network problems.
Also the way i get my network connection back is by waiting 10mins and i usual get it back, if not i restart my computer.