They also use bittorrent: https://arstechnica.com/information-technology/2012/04/exclusive-a-behind-the-scenes-look-at-facebook-release-engineering/ https://ar

They also use bittorrent: https://arstechnica.com/information-technology/2012/04/exclusive-a-behind-the-scenes-look-at-facebook-release-engineering/ https://arstechnica.com/information-technology/2012/04/exclu...