Final answer:
True, a DDoS attack congests the network bandwidth or overwhelms services, making resources unavailable to legitimate users by flooding the target with excessive internet traffic.
Step-by-step explanation:
The statement is true: A Distributed Denial-of-Service (DDoS) attack does indeed aim to make network resources unavailable to legitimate users. This is accomplished by overwhelming the target with a flood of internet traffic, which can either clog the network bandwidth or overburden the services with more requests than they can handle.
As a result, the targeted system becomes slow or completely unresponsive, which prevents legitimate traffic from getting through. There are several types of DDoS attacks, such as those targeting the network layer with a volumetric attack or the application layer with an attack that exploits specific application weaknesses.
For example, a website may be capable of handling a certain number of requests per minute. If that number is exceeded, then the website's performance is degraded, or it may be rendered completely inaccessible.