Definition ∞ A protocol restart refers to the deliberate cessation and subsequent re-initialization of a blockchain network or a specific decentralized application protocol. This action is typically undertaken to implement significant upgrades, resolve critical bugs, or recover from a major security incident. A restart may involve a hard fork, requiring all network participants to update their software to the new protocol version. It aims to restore system integrity or introduce substantial functional improvements.
Context ∞ Protocol restarts are uncommon but impactful events in the digital asset space, often reported in urgent news updates when they occur. They can cause temporary disruptions to network services and require careful coordination among validators and users. Discussions surrounding restarts often focus on the governance mechanisms that authorize such actions and the technical challenges of ensuring a smooth transition.