#explain-card In cryptocurrency networks, a [[Node|node]] is any computer that connects to the blockchain network. Nodes play a crucial role in validating transactions, maintaining the blockchain [[Ledger|ledger]], and ensuring the network's security and decentralization. Types of Nodes: - Full Nodes: Store the entire history of the blockchain and independently verify every transaction. - Light Nodes: Download only a portion of the blockchain and rely on full nodes for transaction verification. - Mining Nodes: Validate and record new transactions on the blockchain through the mining process.