Nœud / Node
Ordinateur participant au fonctionnement et à la validation d'une blockchain. / Computer participating in blockchain operation and validation.
Beginner-friendly explanation
A node is a computer connected to a blockchain network that stores a copy of the data and verifies transactions. More nodes mean higher blockchain security. Example: When you use a crypto app, it often communicates with a node to read or send information.
Intermediate-level insight
Nodes can be full (full nodes) or light (light nodes). Full nodes validate all transactions and maintain network integrity, while light nodes rely on others for some verifications. Example: A Bitcoin full node downloads the entire blockchain, while a light wallet checks only specific data.
Advanced perspective
Nodes form the decentralized backbone of the network. Special nodes like masternodes or Proof of Stake validators perform critical roles like governance, fast validation, or block production. Example: In Ethereum 2.0, validators are special nodes that stake ETH to secure the network.
Blockchain & Technology
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