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Full Node

Intermediate
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A full node is a fundamental component of a blockchain network, acting as a complete, self-contained ledger that records and verifies every transaction ever made within that blockchain. These nodes play a critical role in maintaining the security and integrity of the blockchain by storing its entire history and ensuring that all transactions follow the established rules. Unlike lighter versions of nodes, which only keep a subset of the data, full nodes download and store the entire blockchain, making them indispensable for the network's decentralized nature.

By running a full node, individuals or entities contribute to the blockchain's robustness and decentralization. They validate transactions and blocks, relay information to other nodes, and provide a failsafe for the network. In the event of a catastrophic failure, a full node can help reconstruct the blockchain from its stored data. Although running a full node requires significant storage and processing power, it ensures the blockchain remains secure, transparent, and resilient against attacks or failures, embodying the core principles of decentralized technology.

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