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What Are Nodes?

In blockchain technology, nodes are individual computers or devices that participate in a blockchain network. Each node plays a role in maintaining the integrity, security, and operation of the decentralized ledger. Here's a breakdown:

Types of Nodes

1. Full Node: Stores the entire blockchain history and independently verifies transactions and blocks.🖥️

2. Lightweight (or SPV) Node: Stores only part of the blockchain and relies on full nodes for data verification.💻

3. Mining Node: Competes to create new blocks by solving complex mathematical puzzles (proof of work).🖱️

4. Validator Node: In proof-of-stake or similar systems, these nodes validate transactions and propose new blocks.🛜

5. Masternode: A special full node in some blockchains that performs specific functions like handling instant transactions or voting.💾

Key Functions👨🏾‍💻

Verifying and relaying transactions

Maintaining a copy of the ledger

Ensuring consensus across the network

Participating in governance (in some blockchains)