A node is a computer, in this case, like a cog in a larger network. It’s a connection along many network devices and can be any type of internet device (like a switch, laptop or phone)
In blockchain (Nodes will host ledgers and Smart Contracts where Transaction are executed and validated in distributed)
The device can receive and send data from one device to another.
Note: A node can only perform different roles depending on the type of blockchain (e.g. a fill node can be a super node) :D
Types of nodes you may see in blockchains:
In different block chains, you don’t need to have all of these, different ones for different blockchain
