A guard node is a special type of node that plays a crucial role in maintaining the security and integrity of a blockchain network. These nodes monitor the network and help prevent various attacks, such as double-spending or fraudulent transactions. Guard nodes typically hold additional responsibilities compared to regular nodes. They may verify the accuracy of transactions and block legitimacy, ensuring that all activities comply with the network’s rules. Their presence adds an extra layer of oversight, enhancing the overall reliability of the system.In some networks, guard nodes may also participate in consensus mechanisms, contributing to decision-making processes about which transactions to validate and include in the blockchain. By serving as both a monitor and validator, they help maintain a balance between security and efficiency.Overall, guard nodes are essential for protecting the network, fostering trust among users, and ensuring that the blockchain operates smoothly. Their role is fundamental in mitigating risks and enhancing the overall trustworthiness of the system.