In decentralised systems and blockchain technology, a node refers to a computer or device that participates in the network by maintaining a copy of the blockchain and validating transactions.
Nodes play a crucial role in the functioning of decentralised networks, such as cryptocurrencies. They store a complete copy of the blockchain and communicate with other nodes to ensure consensus and verify the accuracy of transactions.
Nodes are categorised into different types, including full nodes, which download and validate the entire blockchain, and lightweight nodes, which rely on full nodes for transaction verification. Nodes contribute to the security, decentralisation, and integrity of decentralised networks.
