These are the ones that offer the highest level of security to Bitcoin. These nodes in Bitcoin examine every block of information obtained from the various transactions. So í This type of node enables the blockchain to have a robust and distributed file of all transactions performed by its users. It is important to note that a full node will download a full copy of the blockchain when entering the platform. In this way, each complete node contains all the records of these exchanges.
However, downloading and managing the full copy of the blockchain is not a requirement. Actually, There are ways that an entire knot can work with a truncated or cropped copy of it. There are currently various software that make this possible, but the most common is still Bitcoin Core. It is practically the heart of Bitcoin as it contains all the processes, operations, parameters and instructions of the Bitcoin protocol in an original and detailed way.
When we consider the above, full nodes are an inherent part of the network. Which catalogs them of great value for the same, since without them the security of the system would be significantly impaired. In other words, without the nodes, the Bitcoin network simply couldn’t work the way it is. Actually, would be exposed to threats like Sybil Attack, Eclipse Attack and more. Something that would cause this cryptocurrency, which is currently one of the most solid in its category, to lose reputation and interest.
In other words, they are nothing more than a kind of arbitrator who ensures compliance with the established rules for the execution of transactions. And they in turn serve as feedback for the system, since it registers the exchange and makes all this information available to users who use it. All this while enjoying the highest level of security that this category offers.