Have you ever wondered how blockchain networks work? One answer is that nodes are the core components that make this system possible. If you often hear the term “Node” in the crypto industry but still don’t know what it is, this article will help you get a clearer picture.

A node is a computer or device connected to a blockchain network that verifies and relays transactions to the network. Its most important job is to confirm whether each transaction is valid. And when a transaction is confirmed by multiple nodes, it is added to the blockchain.

When a user sends a transaction, the information reaches the first group of nodes. Then those nodes forward it to other nodes in sequence until the transaction is included in a block or rejected. During this process, each node checks the transaction in a space called the Mempool. Once most of the nodes verify that it is correct, the transaction is ready to be added to the blockchain.

Why are nodes an important part of the blockchain? Because this system needs decentralization—there is no central authority that controls everything. With many nodes in the network, it becomes harder for attackers to control or tamper with data, because they would have to control most of the nodes at the same time.

There are several types of nodes, including Full Nodes that store a complete copy of the blockchain, Miner Nodes that mine and verify transactions on the network, Proof-of-Work Validator Nodes that perform similar functions on Proof-of-Stake networks, and Light Nodes that don’t need to store all data.

To set up your own node, there are 3 basic steps: set up the appropriate hardware, download and install the node software, and then run the program to make it work. The most important thing is that you must have sufficient memory—especially if you plan to run a Full Node, since it needs to store a large amount of data—and a stable internet connection with good bandwidth.

Although learning about nodes is fairly specialized, understanding their role can help you see a clearer overview of the blockchain. If you’re interested in supporting the network and learning more deeply about blockchain technology, setting up your own node may be a good option.