Mind you, most peer-to-peer sharing protocols work by having everyone be distributor and downloader at the same time. This is why they are "peer to peer". The

Mind you, most peer-to-peer sharing protocols work by having everyone be distributor and downloader at the same time. This is why they are "peer to peer". The bittorrent protocol for example downloads files in fragments, and every fragment that you have downloaded becomes available for other clients (i.e. you start becoming a server as soon as you have downloaded one fragment)