Node is the unit of a blockchain network system. These are distributed in the blockchain and assigned with a specific task. It is nothing but an electronic device that is connected with a network. That device can be a mobile, tablet, laptop or even a printer, with an internet connection. Every node comes with a unique IP address.
The structure of nodes is arranged like a tree, bus or series. The tree-like structure is called binary trees. The person or the owner of a node gives the service of computing when a transaction of cryptocurrency is made through online. As the owner shares his computing resources to validate a transition, he earns a reward. He receives transaction fees. This process is called 'Mining', and the owner of nodes are called 'miner'.
Processing these transactions is not a piece of cake as it needs excellent processing power. So the average computers cannot perform this task. Professional miners usually employ powerful computing devices to validate these transactions. These computing devices are popular as graphics processing units or GPUs or central processing units or CPUs. In return, they get rewards.
Two Types of Nodes in the blockchain
• Full Nodes
• • Light Weight Nodes
1. FULL NODES
Full node is the node which has the complete history of every transaction made on a blockchain. It also helps the network in different ways, such as it accepts transactions from different full nodes. It also validates those transitions. Lightweight clients can get to know when their transactions are hurting their wallet. At that time, they can transmit the transactions.
2. Light Weight Nodes
Light Weight nodes are the node which has the partial history of the transactions made on the blockchain. These nodes help users to access a blockchain in a decentralized manner. It is secure, as well. So without syncing for the full blockchain, the users can access it.
You already know that nodes maintain the blockchain's integrity. In a simple language, it is nothing but the blockchain copy that you can find on your hardware devices.
When a transaction is made by cryptocurrency, it requires a massive amount of data handling and computing. The nodes have to compute this massive amount of data. In each transaction, the owner or the miner has to perform this job. That is why professional miners keep updating their devices that are GPU or CPU as per the requirements of the data to be handled. The nodes are nothing but supercomputers.
This supercomputer or nodes consume a vast amount of electricity. So the cost of electricity is a factor to run a node. That's why you'll find most of the professional miners around the world where electricity is cheap, like China, Venezuela etc.
Apart from mining, nodes give excellent security. It also comes with unit quantity caps. So this is one of the most crucial features available in a cryptocurrency. Keep in mind both nodes are equally crucial as full nodes not only offers full history but also preserve it safely. On the other hand, light nodes support cryptocurrencies even if you don't have the whole blockchain history. In short, without these two nodes, cryptocurrencies cannot function properly.
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