Peer-to-peer file sharing is a method of distributing digital files directly between users without relying on a central server. In this system, each participant, or "peer," can both download and upload files, allowing for faster and more efficient sharing. Popular applications for this technology include BitTorrent and Napster, which enable users to share music, videos, and other types of content. This approach contrasts with traditional file sharing, where files are stored on a central server and accessed by clients. Peer-to-peer networks can reduce the load on servers and improve download speeds, but they also raise concerns about copyright infringement and security risks.