of possible nodes. In the Blockchain and DLT world, this consensus

mechanism became extremely popular when it was adopted by

Hyperledger Fabric.

1.5.5.5 Tendermint

Tendermint is an opensource software that brings the combination of

a Byzantine Fault Tolerant Blockchain consensus engine and a p2p

networking protocol. It is used and popularized by the Cosmos

interoperable Blockchain.

1.5.5.6 Direct Acrylic Graph

A Direct Acyclic Graph or DAG is a similar network of nodes, just like

Blockchain; however, its underlying consensus mechanism is far

different. In Mathematics, DAG is a special type of graph whose

edge moves in just one direction and can’t go back, hence the name

is justified. In DAG, for any new transaction to be submitted, at least

two previous transactions have to be confirmed. Hence, more the

number of transactions that are submitted, more would be confirmed,

and hence the chain would grow faster. Obviously, DAGs would be

faster and much more scalable than many of the Blockchains and

would require negligible fees (as there are no miners). One of the

most popular DLTs leveraging the benefits of DAG is Hedera

Hashgraph.

1.5.6 Nodes

In Blockchain, the nodes are devices or platforms connected to the

common network that are owned by different individuals or

organizations or parties. The developers can run their services on

these independent platforms.

1.5.7 Shared Replicated Ledger

Each of the nodes on Blockchain are backed by an independent

datastore. As already discussed, all these nodes collectively reach a

consensus to accept or reject a request for a transaction. Also,