Node is one of the terms those interested in digital currencies space should know, as it is one of the basics of the process cryptocurrencies’ mining.
A node is a point of intersection of a set of data that is transmitted to a group of decentralized nodes. These points or servers act as a record of all information or data sent from any point to any other point.
So, a node is simply a point where data is collected and then sent to 8 nodes or other virtual links.
So, these links will do what they made for, which is testing the validity of the transactions or data sent to them. Then each node sends those transactions to a number of other nodes and so on, until that data is recorded on all nodes that constitute the blockchain.
Three Important Points You Should Know
There are three major points are worthy mentioning here:
- Each node here has 8 connections to other nodes, because this is the default amount of connections the client makes without any changes made to it.
- Some nodes have more than the default amount of connections while others may opt to connect to a limited number or stay behind just one other node. There’s no way to know what it actually looks like because it’s designed with privacy in mind (although some monitoring companies certainly try to get very close approximations)
- Nodes can routinely changed who their peers are.
A detailed report about these points available here.
The main function of the node is that it is checking the entire chain to make sure each and every transaction and block follow the rules.
What if the transaction is not valid?
If the transaction is invalid it will never break the “surface” of the network.
Peers will never send that bad transactions to their peers. There’s no way for them to tell, and they treat all data as equal, but if I were to keep sending invalid transaction to any of my 8 peers, they would all eventually block the transaction.
It is worth noting that, this node works 24/7 , and the parent network includes thousands of nodes connected to each other permanently, and at the same time they are monitoring each other, they work in a peer-to-peer way.
But what if a problem, split or disconnection occurred in this network?
If this happens, here comes the importance of blockchain fork that we have mentioned in details how it works in one of the Crypto Capsule.
Types of Nodes
Blockchain network includes 10,783 public nodes as of writing this capsule, but there are several types of nodes, including:
The Super Node, a group of interlinked and well integrated nodes, and it helps the rest of the nodes to work better and faster, and these nodes have a comparative advantage over others even in rewards, so those who manage them are more distinct than others. They are also called super nodes or the listening node.
Also, there are full nodes, usually for individual miners who use a blockchain network separate from the public network, and a number of them are collected and entered into one node, through which they can exchange data. This node then migrates transactions and new blocks to the Blockchain network.