Protocol version refers to the specific set of rules and standards that govern how a blockchain operates. Each blockchain implementation can undergo updates or changes to improve functionality, security, or efficiency. These updates are often categorized under different protocol versions.When a new version is released, it may introduce new features or changes that can enhance performance or fix vulnerabilities. However, not all participants in the network may upgrade immediately. This can lead to different nodes operating under different protocol versions, potentially causing issues in transaction validation or data consistency.For example, if some nodes upgrade to a new version that includes changes in transaction processing, but others remain on the older version, it could result in a fork. A fork separates the blockchain into two distinct paths—one following the old rules and the other the new ones. This can impact everything from transaction speeds to governance of the network, influencing how users and developers interact with the system. Understanding protocol versions is essential for participants to ensure compatibility and maintain smooth operations across the network.