What Are Nodes in Blockchain?

A node is a point in a network that either distributes data to other nodes in the network or is an endpoint of a network. A typical blockchain node may be interconnected to several other nodes in a network.

In a blockchain, the node is usually a device such as a computer, laptop or server. Blockchain nodes can perform a lot of different functions, such as validating or rejecting a block of transactions. A node can also save and store the transaction history inside a block. Similarly, it can distribute the transaction history to other nodes for safekeeping and future reference.

But what exactly is blockchain? 

How Does Blockchain Work?

Blockchain technology has become immensely popular because it is thought to be tamperproof. Besides offering a secure environment for financial transactions, a blockchain network is self-regulating, which prevents unauthorized intervention and manipulation.