Consensus Algorithms
Consensus algorithms allow participants on the blockchain to agree on the validity of transactions and the true state of the blockchain. In other words, a consensus is what makes the blockchain ledger a reliable and secure record of information.
In a blockchain network, every node must confirm the validity of each transaction. This makes it harder for anyone to perform the malicious activity and get away with it. No two versions of a blockchain can exist, making it impossible to alter records without getting noticed.
Blockchain networks use different consensus mechanisms.
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