P2P

File sharing is a sharing of computer data or space in a network. The term file sharing mostly means sharing files in a network, even of in a small local area network. File sharing also makes it easy for people to use the same file or files, by some combination, being able to read or view them, write to or modify them, copy it or print it. Normally, a file sharing system could have one or more administrators, which might have the same or different levels of access privilege and they can also have an allocated amount of personal file storage in a common file system.

Peer-to-Peer or better known as P2P is a file sharing world wide technology that has revolutionized the internet. P2P sharing are computer systems that are connected to each other via the internet. Files can easily be shared between systems on the net work without the need of central server. P2P is a way to share music, video and documents, play games and even facilitate online telephone conversations. Since virtually anyone can join a P2P network just by installing particular software, millions can be connected at one time. Examples of P2P fils sharing programs are Limewire, uTorrent and BitTorrent. 

Reference:

https://www.wired.com/2005/01/bittorrent-2/