Blockchain Fundamentals

Node

A node is any computer that participates in a blockchain network by maintaining a copy of the distributed ledger. Nodes validate transactions, propagate data, and help achieve consensus across the system. There are different types: full nodes store the entire blockchain, while light nodes only store essential parts. By running independently, nodes ensure decentralization, fault tolerance, and censorship resistance. Whether in Ethereum, Bitcoin, or private blockchains, nodes form the backbone of blockchain technology, keeping networks transparent and secure.

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