Going through an article, I found out a very interesting facts that I would love to share with all ,
NODES :
Nodes are we know is a part of the blockchain that store data , meaning that the blockchain exist as nodes.
But I am here to inform you of how the blockchain is secure by nodes
Nodes can be online or offline. Online nodes are receiving, saving and broadcasting all the latest blocks of transactions from and to other nodes, while offline nodes do not. When an offline node comes back online, it will need to catch up with the rest of the blockchain first by downloading all blocks that were added to the blockchain ever since the node went offline. This process is often referred to as
synchronizing with the blockchain.
Image for post.
Source :
https://medium.com/coinmonks/blockchain-what-is-a-node-or-masternode-and-what-does-it-do-4d9a4200938f