DDoS attacks are a significant threat to online services. The main objective of the attacks is to make a service unavailable. Cardano can be seen as an online service. It provides a platform for executing smart contracts, transferring funds, and other functionalities over the Internet. Like any online service, it could theoretically be targeted by a DDoS attack. However, due to its decentralized nature and the security measures in place, it is much more resilient to such attacks than traditional centralized online services. Read about how resistant Cardano is to DDoS attacks.
Read the article: https://cexplorer.io/article/how-is-cardano-protected-from-ddos-attacks