Would you please try netstat -n so we can see the IP addresses rather than the host names? It will be easier to determine on-net/off-net traffic.
From the looks of it though, those yyzs06-*in-f* entries are typically Google CDN (Content Distribution Network) for Google/YouTube video streaming. These are local sites that help serve up content quicker.
If your PC was idle when you ran netstat, then there's some software running in the background doing something you are not aware of.