Peer-to-Peer Network (P2P)

Definition

A peer-to-peer network connects participants directly so they can exchange data without routing every interaction through one central server. Bitcoin nodes use peer connections to announce transactions and blocks, request missing data, and discover other reachable nodes. Each node still applies its own validation rules; receiving a message from a peer does not make the message trustworthy. The network structure helps distribute information and reduces dependence on a single operator, but not every node connects to every other node. Connectivity, peer diversity, bandwidth, and software behavior affect how information propagates. Peer-to-peer communication also does not automatically provide anonymity or prevent traffic analysis. A hostile set of connections can distort what a node initially sees, making independent validation and sound networking design important. P2P describes the communication architecture, while consensus describes how participants decide which received information belongs in the accepted ledger.