before the blocks are committed to the Blockchain network. The later

Blockchain networks have tried to adopt many different and unique

consensus processes that can make a decentralised system work

faster, as represented in Figure 1.15 as follows:

Figure 1.15: Types of Consensus Models in Blockchain and DLTs

We will discuss them in the later chapters along with the Blockchain

protocols where they are implemented.

1.12.2 Scalability and Performance

We already know that cryptocurrencies were introduced in the

market as an alternate payment mechanism. Currently, VISA is a

global standard for payment processing and processes almost 1700

transactions per second; however, it claims to be able to handle up