Node Clients

In Ethereum, a node is any computer that is connected to the network and running software that can participate in the consensus process by validating transactions and blocks. These nodes can be classified into different categories based on their function and capabilities. One way to categorize nodes is by their client software.
Node clients are software programs that implement the Ethereum protocol and allow a node to communicate with other nodes on the network. Some popular Ethereum node clients include Geth, Parity, Besu, Nethermind, and OpenEthereum (formerly known as Parity-Ethereum). Each client has its own set of features, advantages, and disadvantages.
Running an Ethereum node client is essential for developers, miners, and users who want to interact with the Ethereum network. Developers use node clients to test and deploy smart contracts, while miners use them to validate and mine new blocks. Users can use node clients to run decentralized applications and interact with the Ethereum network without relying on third-party services.
Running a node client requires significant computational resources, as the node must download and store the entire blockchain and validate transactions in real-time. As a result, most users opt to run a light client, which only downloads a portion of the blockchain and relies on other nodes to validate transactions.