Final answer:
DDoS (Distributed Denial of Service)
Step-by-step explanation:
An attack that renders a computer unable to respond to legitimate users because it is being bombarded with data requests is known as a DDoS (Distributed Denial of Service) attack.
DDoS attacks involve multiple compromised computers, known as a botnet, which are used to flood the target computer or network with a high volume of traffic.
These attacks can overwhelm the target system's resources and make it unable to respond to legitimate requests.