Blockchain Fundamentals

Ledger

A ledger in blockchain is a distributed database that records all transactions across a network. Unlike traditional ledgers held by a central authority, blockchain ledgers are maintained by multiple nodes and are transparent, secure, and immutable. Every new transaction is validated and added in a block, forming a chronological chain. This decentralized ledger ensures trust and accountability without intermediaries. It’s widely used in cryptocurrency, DeFi, logistics, and even identity management systems.

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