A node is any computer that is connected to a cryptocurrency network, for example, any computer connected to the Bitcoin network can be regarded as a Bitcoin node. Depending on its type, a node can store some or all of the blockchain data. A full node is any computer connected to the blockchain network 24/7 and fully synchronized with it. Full nodes store all data of the blockchain starting from the Genesis block. Full nodes serve the network free of charge, they download and validate every block and transaction according to the rules of the consensus algorithm...