If this is all happening wirelessly, that could be your problem. Looks like you have a 4g modem with a built in router. Is anything in the aar stack connected to the router through Ethernet, or is everything using WiFi? Try hooking the laptop up to one of the lan ports on the back of your router, see if that helps things.
Could also just be all the aar apps doing their thing for the first time, pulling from databases, downloading cover art, etc. once your library is all set up, they should calm down. Only way to really check this is to log into your router and see who the loudest talker is.