--- title: Node url: "https://www.unknowngravity.com/en/glosario/nodo" site: Unknown Gravity published: "2025-06-07T15:17:05+00:00" modified: "2026-07-30T15:43:02+00:00" language: en-US description: A node is a device connected to a blockchain network which performs one or more critical functions for the maintenance of the decentralized system. section: "Home > Node" --- # Node GLOSSARY · BLOCKCHAIN & WEB3 A node stores the ledger and validates every block. Tell the five types apart, full, light, validator, miner and archive, and what each one is for. WHAT IS IT? · FOR DUMMIES A **node** is like a **participant in a great digital conversation**, where everyone is attentive to verify that what is said is true. Each node helps to verify that the transactions are correct and that everyone is following the rules of the blockchain network. The more nodes there are, **the safer and more reliable** the network becomes. WHAT IS IT? · PRO A **node** is a **device connected to a blockchain network** which performs one or more critical functions for the maintenance of the decentralized system. In its most basic form, a node stores a **full or partial copy of the distributed ledger** (blockchain) and participates in the **validation, propagation and synchronization** of new transactions and blocks. It is an essential piece to guarantee the **integrity, censorship resistance, and network availability**. There are different types of nodes depending on their function: - **Full node**: keeps a complete copy of the blockchain history and validates all transactions according to the rules of consensus. - **Light node**: Download only partial information (such as headers) and rely on full nodes for verification. - **Validator node**: actively participates in the creation and validation of blocks (in PoS or DPoS). - **Mining Node**: in blockchains with PoW, it competes to add new blocks solving computational problems. - **File Node**: Retains all history, including intermediate states, useful for audits or indexers. In networks such as **Ethereum, Bitcoin, or Polkadot**, nodes constantly communicate information about blocks, pending transactions (mempool), consensus events and network updates. Its decentralization is essential to avoid single points of failure, guarantee resistance to manipulation and offer **verifiable transparency**. Anyone can run a node, allowing for an open architecture, although its technical and economic maintenance varies depending on the network. Running a node provides **independence, sovereignty over verification and, in some cases, economic rewards or the right to vote** in on-chain governance systems. ## 01 / Key points - It is a device (computer or server) that participates in a blockchain network - You can store, validate, transmit or create blocks and transactions - There are several types: complete, lightweight, validator, mining, archival - It guarantees the decentralization, security and transparency of the system - Any user can run a node on most public networks ## 02 / Advantages - **Decentralization and resistance to censorship are increasing** - **Provides independent verification** without depending on third parties - **Improves network security and availability** - **Allows you to participate in validation or governance processes** - **Technical base for developers and companies that integrate blockchain** ## 03 / Disadvantages - **Requires technical knowledge and proper configuration** - **It can consume significant resources** (bandwidth, space, energy) - **It must be constantly updated and synchronized** - **In some networks, nodes have associated hardware or staking costs** - **Little use for users who do not want to interact at a technical level** RELATED CONCEPTS [Blockchain](/en/glosario/blockchain) [Proof of Stake (PoS)](/en/glosario/proof-of-stake-pos) [Fork (Bifurcation)](/en/glosario/fork-bifurcacion) [Gas](/en/glosario/gas) [Remote Procedure Call (RPC)](/en/glosario/rpc-remote-procedure-call) KEEP LEARNING [What Do Blockchain Developers Do?](/en/articulos/que-hacen-los-desarrolladores-blockchain) [Comparison of smart contracts programming languages](/en/articulos/lenguajes-programacion-smart-contracts) [How to protect your digital assets in the cryptocurrency world](/en/articulos/como-proteger-tus-activos-digitales-criptomonedas) [Future blockchain developments](/en/articulos/futuros-desarrollos-de-blockchain) [How to raise investment for your blockchain project: Real and effective strategies](/en/articulos/como-levantar-inversion-para-tu-proyecto-blockchain-sin-vender-humo) RELATED SERVICES [Blockchain protocol development](/en/servicios/desarrollo-de-protocolos-blockchain) [Development for Ethereum (EVM)](/en/servicios/desarrollo-para-ethereum-evm) [Smart contract auditing](/en/servicios/blockchain-security-audits) [Blockchain consulting for companies](/en/servicios/consultoria-blockchain) [Web3 Development](/en/servicios/desarrollo-web3) [Full glossary](/en/glosario) This entry is informative. It is not legal, tax or investment advice. The rules cited change: check the current version on [BOE](https://www.boe.es) and [EUR-Lex](https://eur-lex.europa.eu).