Fault Tolerance in Decentralized Networks: How Blockchain Systems Stay OperationalEnglish 日本語한국어繁體中文ไทยPortuguêsItalianoDeutschFrançaisEspañolBlockchain networks are built for environments where failure is routine. Strong fault tolerance improves blockchain security, availability, and long-term reliability as decentralized ecosystems grow. Enterprise and application-specific networks often use Byzantine Fault Tolerant algorithms instead, such as Practical Byzantine Fault Tolerance (PBFT), Tendermint, HotStuff, or Istanbul Byzantine Fault Tolerance (IBFT). Why Fault Tolerance Matters for Blockchain Security and ScalabilityFault tolerance matters more as blockchains carry financial markets, enterprise infrastructure, and public services that must stay available through technical failures and attempted attacks alike. Fault tolerance is a blockchain network’s ability to keep operating correctly even when some nodes fail, disconnect, or behave maliciously.