> For the complete documentation index, see [llms.txt](https://encryptionai-1.gitbook.io/encryptionai-blockchain-testnet/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://encryptionai-1.gitbook.io/encryptionai-blockchain-testnet/what-is-blockchain/nodes.md).

# Nodes

## Nodes

In the context of blockchain technology, a node refers to a computer or device that participates in the network and maintains a copy of the blockchain's entire transaction history. Nodes play a crucial role in the decentralized nature of blockchain networks, as they collectively validate and store transactions, enforce consensus rules, and contribute to the security and integrity of the network.