Blockchain Network

A blockchain network is the group of computers, called nodes, that run the same software, exchange transactions and blocks with one another, and keep matching copies of a shared ledger. The network enforces its rules through a consensus mechanism, such as proof of work or proof of stake, so that participants agree on which transactions are valid and in what order. Networks are often described by who may take part. Public blockchains such as Bitcoin and Ethereum let anyone run a node or send transactions, while permissioned blockchains restrict participation to approved members, as in many enterprise and banking projects. The word "network" is often used for the live system and its participants, while "blockchain" can refer to the data structure itself. In payments, a single network may host many tokens and stablecoins, and transfers between networks require bridges or other blockchain interoperability tools.