Consensus Mechanisms

How a distributed network of untrusted nodes agrees on a single canonical transaction history — Proof of Work, Proof of Stake, and BFT-style consensus.

Read

45 min

Practice MCQs

25

Interview QA

25

Edition

v3

Editorial status

Reviewed

Relevant for

Blockchain Developer

Scope: NISTIR 8202; Bitcoin white paper; Ethereum proof-of-stake documentation reviewed 2026-09-04; CometBFT main specification reviewed 2026-09-04; PBFT, HotStuff, and Raft papers.