Backups
In most blockchains, each computer acting as a full participant in the network holds a complete copy of all transactions that have ever happened since the launch of the network. This means that even under catastrophic duress, as long as a fraction of the network computers remains functional, a complete backup will exist.
In PoS chains, there tend to be far fewer full participants so the number of backups and distribution is far less. So far, this reduced level of redundancy has not been an issue.
Consistency
As discussed in prior chapters, hashing and the Merkle root of all transactions and behaviors on the blockchain allow for an easy calculation of consistency. If consistency is broken on a blockchain, it will be noticed instantly. Blockchains are designed to never be inconsistent. However, just because data is consistent does not mean it is accurate. These issues will be discussed in Chapter 20, Scalability and Other Challenges.
Peer-to-peer systems
Most computer systems in use today...
