What is the importance of an Ethereum node within the blockchain, and how does it interact with others?
Ethereum is actually not a cryptocurrency, but a decentralized P2P network based on a public and open-source computer protocol.
Its native cryptocurrency is Ether (ETH), although it is often called by the name of the entire network, which is Ethereum.
P2P networks, or peer-to-peer networks, consist of peer nodes that communicate with each other through the Internet. Thus, it is the nodes that are the fundamental constituents of these networks.
Therefore, the fundamental constituents of Ethereum are its nodes, which form the P2P network, and obviously the protocol on which they are based.
In order to be part of the Ethereum P2P network, and to interact with other nodes, an Ethereum node must adhere to its basic protocol to the letter, which of course must be absolutely identical for all nodes, or it will be excluded from the network itself.
The operation of an Ethereum node
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