CBSA Blockchain Network Architectures 2

Question 1

In a federated blockchain network, who typically controls the consensus process?

Accepted Answer

A pre-selected group of nodes

Answer

Federated (or consortium) blockchains delegate consensus to a pre-selected group of trusted nodes rather than open participation.

Question 2

Which network topology is most resilient to single-node failures in a blockchain peer-to-peer network?

Accepted Answer

Mesh topology

Answer

A full mesh topology provides multiple redundant paths between nodes, making the network highly resilient to individual node failures.

Question 3

What distinguishes a 'sidechain' from the main blockchain network?

Accepted Answer

It is a separate blockchain pegged to the main chain for specific use cases

Answer

A sidechain is an independent blockchain connected to the main chain via a two-way peg, enabling assets and data transfer between them.

Question 4

In Hyperledger Fabric, what is the role of the 'orderer' node?

Accepted Answer

It sequences transactions into blocks and distributes them

Answer

The orderer in Hyperledger Fabric is responsible for ordering transactions into a consistent sequence and broadcasting blocks to peers.

Question 5

Which characteristic best defines a 'permissioned' blockchain network architecture?

Accepted Answer

It restricts participation to identities that have been granted access

Answer

Permissioned blockchains require participants to be explicitly authorized before they can read, write, or validate on the network.

(CBSA) Certified Blockchain Solution Architect Practice Test