Node Basics
A node is a computer that connects to a blockchain network and is responsible for storing, validating, or relaying transaction and block data. Different nodes perform different functions and collectively maintain the network’s decentralization, synchronization, and security.
What Is a Node?
A node is a computer connected to a blockchain network that can store, validate, or relay transaction and block data. Blockchains operate through numerous nodes distributed across different locations rather than relying on a single centralized server. Each node acts like a communication endpoint, helping the network maintain connectivity and synchronization.
Common Node Types
Full nodes download and validate transactions and blocks according to the network’s rules, making them an important part of network security. Listening nodes publicly expose and relay data; mining nodes run mining software and typically compete for block rewards with specialized hardware; lightweight clients retrieve only the necessary information, do not store a complete copy of the chain, and do not perform complete validation.
Why Are Nodes Important?
The broad distribution of nodes makes it more difficult for a single entity to tamper with or censor a blockchain, because many independent participants separately hold and validate copies of the data. The more diverse the nodes are in terms of geographic location and operating practices, the more resilient the network generally is and the better able it is to continue operating without a centralized authority.
Original Tutorial
https://www.binance.com/zh-CN/academy/glossary/node
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