What Is an Ethereum Node?

ethereum node

Blockchain nodes are physical devices that form the infrastructure of the blockchain network. These nodes, such as laptops, PCs, servers, and others, help transmit and store blockchain data. In this article, we will explore what an Ethereum node is and how it works, with the help of CoinMinutes.

What Is An Ethereum Node? 

Ethereum node is a physical device connected to the internet such as a computer, or phone,… used on the Ethereum network platform, nodes in the network are connected and interact directly with each other around the world creating a sustainable blockchain network.

Nodes act like communication points in an Ethereum network with many points to send information back and forth to validate transactions and store data about the state of the Blockchain. Depending on what your specific needs are, whether it’s a decentralized application (Dapp) or a wallet, there are three different types of nodes that can be run by any client: full nodes, light nodes, and archive nodes.

Each Ethereum node will interpret data differently and provide different methods for synchronization – this refers to how quickly your node can retrieve updated information for your client to interpret.

Why Are Nodes Important to Web3?

The goal of nodes is to maintain the reliability of data stored on the blockchain. In fact, the entire blockchain history can be stored with a single full node running it. However, the more nodes a Blockchain has, the more decentralized it becomes and thus more resilient to threats such as system crashes or power outages. When a new block of data is added to a blockchain, a node transmits that block to other nodes on the network. Based on the validity of the new block and node type, full nodes can reject or accept the block. When a new block is accepted by a node, the information is added to the beginning of previously existing blocks.

The main role is the infrastructure to build and operate blockchain or Web3. The node is a required part of any blockchain. As the node network becomes wider, the capacity and security of the network will increase. As well as increasing the number of nodes, it helps support the Web3 network to expand its processing capacity. Increase processing speed, bringing better experiences to users. In addition, the quality of node operators will strengthen the network’s ability to operate effectively or not.

Types of Ethereum Nodes

Full node

ethereum node

Full nodes are full of data, they store and can distribute all blockchain data from the Ethereum network. A full node additionally participates in the block validation process, it can verify all blocks and states on the network.

One advantage of deploying full nodes is that it can interact directly with any smart contract on the public blockchain. Full nodes can also deploy smart contracts directly to the public blockchain.

Full data usage and storage, as well as live smart contract functionality, come at a cost. Full nodes can take up a large amount of your computer’s bandwidth and hardware resources. Retrieving all the data can also be very time-consuming, sometimes taking days to synchronize your data when the node is first deployed. The node must then be maintained, upgraded, and kept online so that the full synchronization process does not have to be repeated.

Light nodes

Light nodes are similar to full nodes but process less information. The lightweight node stores header string information (basic information stored in a block such as a timestamp and a hash of the previous block,) but will only receive additional information upon request. They can verify the validity of data but do not fully participate in block validation. Light nodes are almost always implemented in remote clients. Because these nodes do not perform more intensive data storage and writing processes, they have proven useful for low-capacity devices such as smartphones.

Archive nodes

Storage nodes are nodes that store all the information that a full node does and build a historical archive of blockchain states. Storage nodes retain historical data even after the client has completed the synchronization process. On the other hand, full and light nodes “prune” historical blockchain data, meaning they can rebuild, but do not retain this information.

While storage nodes may not be useful to the average user, they have proven effective in adopting block explorers, wallet providers, and on-chain analytics.

How Does an Ethereum Node Work?

Simply put, Ethereum Node works together to ensure the safety and security of the system. To participate in the network, Ethereum Nodes need to install Ethereum Client software such as Geth or Parity. When installing Ethereum Client, Nodes will run a virtual machine program called Ethereum Virtual Machine (EVM). EVM’s mission is to execute Smart Contracts – a type of smart contract.

To ensure the validity of transactions, the network uses Miner Nodes to verify them. Training nodes must follow a consensus rule called Consensus (or consensus mechanism), to ensure network consistency and independence.

Ethereum Node vs Ethereum Client 

Ethereum Node and Ethereum client work in tandem and both terms are often used interchangeably. However, both work separately to access the Ethereum network.

Think of nodes and clients acting like a computer accessing the internet: the Ethereum node is an operating system, like Windows or iOS, and the Ethereum client is the computer itself. The client gives users access to the node operating system, which in turn, gives you internet access. Different computers will be able to give you access to the same operating system, and different operating systems will give you access to the same internet.

What Are Some Problems with Scaling Ethereum Nodes?

ethereum node

As the Ethereum blockchain continues to scale, running an Ethereum node can become difficult, leaving only a handful of nodes responsible for securing the network. This again points to centralization issues and problems that Ethereum needs to solve.

Each node keeps the entire Ethereum transaction history. As well as the current status of account balances and contracts. This is obviously quite a difficult task. Especially with the speed of increasing the number of transactions every 10 – 12 seconds when there is a new block.

The concern is if developers increase the size of each block to accommodate more transactions. Then the node will need to store more data. So much so that it could knock people off the grid. If nodes grow too large, only a few large companies will have enough resources to operate them.

Fully operating an Ethereum node, despite its many obstacles, is the best way for users to achieve security and privacy. If this becomes more difficult, with more barriers in place, it will limit the number of people who can authenticate transactions themselves.

In other words, decentralization and network scalability conflict with each other. Developers are trying to find a solution to the problem.


This article aims to provide useful information to help you choose the node that best fits your needs. CoinMinutes hope you find this article informative and helpful.

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Chi Do
Chi Do
Chi Do is a content writer at CoinMinutes, responsible for creating most of the content on the website, including news related to Bitcoin (BTC), Ethereum (ETH), Blockchain, Decentralized Finance (DeFi), and more. With a keen interest in cryptocurrencies since the 2020s, Chi has acquired extensive experience and knowledge in this field. Chi holds a Bachelor's degree in communication from Academy of Journalism and Communication in Vietnam.

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