Blockchain Architecture And Components

Blockchain Architecture And Components

Blockchain Architecture and Components Understanding Blockchain Nodes Blockchain is a decentralized, distributed ledger technology that records data across multiple computers (nodes) in a secure, transparent, and immutable way. To understand how blockchain operates, it's essential to break down its architecture and the role of nodes within it. 1. Blockchain Architecture Overview Blockchain architecture typically comprises the following core components: 1.1. Blocks Structure: Each block contains a header and a body. Header Includes: Previous block hash Timestamp Nonce (for Proof of Work) Merkle root (hash of all transactions in the block) Body: List of transactions. 1.2. Chain Blocks are linked using cryptographic hashes, forming a sequential chain. This linking ensures immutability—changing a block affects all subsequent blocks. 1.3. Distributed Ledger The ledger (blockchain) is stored across multiple nodes, providing redundancy and resistance to tampering. 1.4. Consensus Mechanisms Methods for nodes to agree on the validity of transactions and blocks. Examples: Proof of Work (PoW), Proof of Stake (PoS), Practical Byzantine Fault Tolerance (PBFT). 1.5. Smart Contracts Self-executing contracts with the terms directly written into code. Run on blockchain platforms like Ethereum. 2. Understanding Blockchain Nodes A node is any computer that participates in the blockchain network. Different nodes perform different roles

Updated July 15, 2026