{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do consensus protocols in blockchain avoid distributed denial of service (DDoS) attacks?","a":"Node election and role assignment: Node election mechanisms in consensus protocols usually adopt random election or weighted election to ensure that there are enough nodes in  the network. Additionally, nodes can be divided into multiple subsystems based on different roles, such as validators, witnesses, etc., thereby dispersing attack targets."}]}],"pr":"9899fb049f55529b6a97443d2bcb5a98148ee90c845d08ac5fc7fd3688952194"}