Microsoft has introduced the Torrent Peer-to-Peer technology into Windows10 for downloading Update . in the Windows 10 this option is enabled by default, this can help speed up app and update downloads and also loss few bandwidth of internet.
When this turned on , your PC may also send parts of previously downloaded Windows updates and apps to PCs on your local network or PCs on the internet , depending on what's option you selecter whether its is on or off.
To Disable this go to Start > Settings > Update & Security > Windows Updates > Advance Option > Choose How Updates are Delivered > Turn off the Default Setting.