A computer connected to the blockchain network that helps validate transactions and maintain the ledger.
A Node is any computer connected to a blockchain network that participates in validating transactions, storing data, and maintaining the integrity of the ledger. Nodes ensure decentralization by distributing the blockchain across many independent machines.
Types of Nodes
Full Nodes: Store the entire blockchain and validate all rules
Light Nodes: Store partial data and rely on full nodes
Mining/Validator Nodes: Secure the network through PoW or PoS
Archive Nodes: Store complete historical state, including old data
Each plays a unique role in network health.
What Nodes Do
Verify transactions
Propagate data across the network
Enforce consensus rules
Prevent double-spending
Maintain uptime and reliability
Provide infrastructure for wallets and dApps
Nodes collectively ensure the network remains decentralized and censorship-resistant.
Summary
A node is a computer that connects to a blockchain network to validate transactions and maintain the ledger. It forms the backbone of decentralized blockchain architecture.
