Table 4.

Consensus-based.

Ref.	Consensus	Performed Function	Technique Deployed
[93]	Paxos	Implemented to provides guaranteed consensus solution in distributed systems	Applies technique of flexible Paxos to reach consensus
[94]	Paxos	Provides a resolution to operational bottlenecks in consensus algorithms	Executes programmable network hardware to attain consensus service for requests
[95]	Raft	Solves inefficiencies and leader load balance issues, to enhance the stability of the algorithm	Uses Kbucket formed in the Kademlia protocol to influence the leader election process in the Raft algorithm, an approach seeking to improve the algorithm
[96]	Raft	Resolves message replication inconsistencies in blockchain networks	The Raft algorithm is enhanced through use of the Blockchain Hyperledger Fabric framework