You are going to open a website. Which attackes can down your website?

DDOS (Distributed Denial of Service) attacks overwhelm a website with traffic from multiple sources, making it unavailable to legitimate users. This is the only option listed that is a recognized attack type specifically designed to take down websites. 'Echo attack' and 'Botting' are not standard security terms, and 'Unlimited pings' describes a technique but isn't the formal attack category name.