[tinus_hn]

BitTorrent does the same thing and used to be a lot more common, just typically not between hosts close to each other.

[M2Ys4U]

TCP-based bittorrent, yes.

The uTP protocol (which has an IETF version called LEDBAT) was specifically designed to be used for background transmission, and it should slow itself down if there are competing TCP flows.